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Could not find the Qt platform plugin "eglfs" in ""

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  • K kutluyigitturk

    @JKSH I am creating the folder named /qt5opi in the /usr/local directory. I create with this command, sudo mkdir /usr/local/qt5opi . You can see the same process when you open the 14th minute of the video.

    When I execute this command ./OrangeDemoQml -platform xcb I get a very similar error.

    ./OrangeDemoQml -platform xcb is the error I get when I execute this command:

    qt.qpa.xcb: could not connect to display 
    qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
    This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
    
    Available platform plugins are: linuxfb, minimal, offscreen, vnc, webgl, xcb.
    
    Aborted
    

    Errors I get after running export QT_DEBUG_PLUGINS=1

    QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/qt5opi/plugins/platforms" ...
    QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5opi/plugins/platforms/libqlinuxfb.so"
    Found metadata in lib /usr/local/qt5opi/plugins/platforms/libqlinuxfb.so, metadata=
    {
        "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
        "MetaData": {
            "Keys": [
                "linuxfb"
            ]
        },
        "archreq": 0,
        "className": "QLinuxFbIntegrationPlugin",
        "debug": false,
        "version": 331520
    }
    
    
    Got keys from plugin meta data ("linuxfb")
    QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5opi/plugins/platforms/libqminimal.so"
    Found metadata in lib /usr/local/qt5opi/plugins/platforms/libqminimal.so, metadata=
    {
        "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
        "MetaData": {
            "Keys": [
                "minimal"
            ]
        },
        "archreq": 0,
        "className": "QMinimalIntegrationPlugin",
        "debug": false,
        "version": 331520
    }
    
    
    Got keys from plugin meta data ("minimal")
    QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5opi/plugins/platforms/libqoffscreen.so"
    Found metadata in lib /usr/local/qt5opi/plugins/platforms/libqoffscreen.so, metadata=
    {
        "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
        "MetaData": {
            "Keys": [
                "offscreen"
            ]
        },
        "archreq": 0,
        "className": "QOffscreenIntegrationPlugin",
        "debug": false,
        "version": 331520
    }
    
    
    Got keys from plugin meta data ("offscreen")
    QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5opi/plugins/platforms/libqvnc.so"
    Found metadata in lib /usr/local/qt5opi/plugins/platforms/libqvnc.so, metadata=
    {
        "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
        "MetaData": {
            "Keys": [
                "vnc"
            ]
        },
        "archreq": 0,
        "className": "QVncIntegrationPlugin",
        "debug": false,
        "version": 331520
    }
    
    
    Got keys from plugin meta data ("vnc")
    QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5opi/plugins/platforms/libqwebgl.so"
    Found metadata in lib /usr/local/qt5opi/plugins/platforms/libqwebgl.so, metadata=
    {
        "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
        "MetaData": {
            "Keys": [
                "webgl"
            ]
        },
        "archreq": 0,
        "className": "QWebGLIntegrationPlugin",
        "debug": false,
        "version": 331520
    }
    
    
    Got keys from plugin meta data ("webgl")
    QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5opi/plugins/platforms/libqxcb.so"
    Found metadata in lib /usr/local/qt5opi/plugins/platforms/libqxcb.so, metadata=
    {
        "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
        "MetaData": {
            "Keys": [
                "xcb"
            ]
        },
        "archreq": 0,
        "className": "QXcbIntegrationPlugin",
        "debug": false,
        "version": 331520
    }
    
    
    Got keys from plugin meta data ("xcb")
    QFactoryLoader::QFactoryLoader() checking directory path "/home/opi/platforms" ...
    loaded library "/usr/local/qt5opi/plugins/platforms/libqxcb.so"
    qt.qpa.xcb: could not connect to display 
    qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
    This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
    
    Available platform plugins are: linuxfb, minimal, offscreen, vnc, webgl, xcb.
    
    Aborted
    
    
    JKSHJ Offline
    JKSHJ Offline
    JKSH
    Moderators
    wrote on last edited by
    #25

    @kutluyigitturk said in Could not find the Qt platform plugin "eglfs" in "":

    You can see the same process when you open the 14th minute of the video.

    ? The video is less than 6 minutes long.

    I am creating the folder named /qt5opi in the /usr/local directory. I create with this command, sudo mkdir /usr/local/qt5opi

    OK, where do the .so files (like libQt5Core.so) come from?

    When I execute this command ./OrangeDemoQml -platform xcb I get a very similar error.

    The root cause is very different.

    • The "eglfs" plugin failed to load because the plugin does not exist.
    • The "xcb" plugin failed because your X Server could not connect to your display: "qt.qpa.xcb: could not connect to display "

    Do you have a display attached to your device? Have you logged into the display with the same Pi account that you used with SSH?

    Qt Doc Search for browsers: forum.qt.io/topic/35616/web-browser-extension-for-improved-doc-searches

    K 2 Replies Last reply
    0
    • JKSHJ JKSH

      @kutluyigitturk said in Could not find the Qt platform plugin "eglfs" in "":

      You can see the same process when you open the 14th minute of the video.

      ? The video is less than 6 minutes long.

      I am creating the folder named /qt5opi in the /usr/local directory. I create with this command, sudo mkdir /usr/local/qt5opi

      OK, where do the .so files (like libQt5Core.so) come from?

      When I execute this command ./OrangeDemoQml -platform xcb I get a very similar error.

      The root cause is very different.

      • The "eglfs" plugin failed to load because the plugin does not exist.
      • The "xcb" plugin failed because your X Server could not connect to your display: "qt.qpa.xcb: could not connect to display "

      Do you have a display attached to your device? Have you logged into the display with the same Pi account that you used with SSH?

      K Offline
      K Offline
      kutluyigitturk
      wrote on last edited by
      #26

      @JKSH Sorry, here is the video I was talking about. https://youtu.be/TmtN3Rmx9Rk

      I don't know where it came from, I think you can understand it if you examine the youtube link I gave above.
      I'm very new to this stuff, please excuse my ignorance.

      Yes, Orange Pi is connected to a monitor via HDMI cable. Should I try unplugging the HDMI cable?

      1 Reply Last reply
      0
      • JKSHJ JKSH

        @kutluyigitturk said in Could not find the Qt platform plugin "eglfs" in "":

        You can see the same process when you open the 14th minute of the video.

        ? The video is less than 6 minutes long.

        I am creating the folder named /qt5opi in the /usr/local directory. I create with this command, sudo mkdir /usr/local/qt5opi

        OK, where do the .so files (like libQt5Core.so) come from?

        When I execute this command ./OrangeDemoQml -platform xcb I get a very similar error.

        The root cause is very different.

        • The "eglfs" plugin failed to load because the plugin does not exist.
        • The "xcb" plugin failed because your X Server could not connect to your display: "qt.qpa.xcb: could not connect to display "

        Do you have a display attached to your device? Have you logged into the display with the same Pi account that you used with SSH?

        K Offline
        K Offline
        kutluyigitturk
        wrote on last edited by
        #27

        @JKSH I want to talk about something else. This is the command I ran while configuring it:

        ../qt-everywhere-src-5.15.2/configure -opengl es2 -device linux-rasp-pi2-g++ -device-option CROSS_COMPILE=/opt/qt5opi/gcc-linaro-7.5.0-2019.12-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf- -sysroot /opt/qt5opi/sysroot -prefix /usr/local/qt5opi -opensource -confirm-license -skip qtscript -skip qtwayland -skip qtdatavis3d -nomake examples -make libs -pkg-config -no-use-gold-linker -v

        You may ask why you are configuring Raspberry Pi2 while processing for Orange Pi One V1.1. Because there is no installation configuration for Orange Pi. I am attaching an image below and this image shows us on which devices we can use it. I chose the Raspberry Pi2 because it is closest to the Orange Pi in terms of processor architecture.

        Adsız.png

        After running the configuration file, I would like to share the configuration summary with you.

        Configure summary:
        
        Building on: linux-g++ (x86_64, CPU features: mmx sse sse2)
        Building for: devices/linux-rasp-pi2-g++ (arm, CPU features: neon)
        Target compiler: gcc 7.5.0
        Configuration: cross_compile compile_examples enable_new_dtags largefile neon precompile_header shared rpath release c++11 c++14 c++1z concurrent dbus reduce_exports stl
        Build options:
          Mode ................................... release
          Optimize release build for size ........ no
          Building shared libraries .............. yes
          Using C standard ....................... C11
          Using C++ standard ..................... C++1z
          Using ccache ........................... no
          Using gold linker ...................... no
          Using new DTAGS ........................ yes
          Using precompiled headers .............. yes
          Using LTCG ............................. no
          Target compiler supports:
            NEON ................................. yes
          Build parts ............................ libs
        Qt modules and options:
          Qt Concurrent .......................... yes
          Qt D-Bus ............................... yes
          Qt D-Bus directly linked to libdbus .... yes
          Qt Gui ................................. yes
          Qt Network ............................. yes
          Qt Sql ................................. yes
          Qt Testlib ............................. yes
          Qt Widgets ............................. yes
          Qt Xml ................................. yes
        Support enabled for:
          Using pkg-config ....................... yes
          udev ................................... yes
          Using system zlib ...................... yes
        Qt Core:
          DoubleConversion ....................... yes
            Using system DoubleConversion ........ yes
          GLib ................................... yes
          iconv .................................. no
          ICU .................................... yes
          Tracing backend ........................ <none>
          Logging backends:
            journald ............................. no
            syslog ............................... no
            slog2 ................................ no
          Using system PCRE2 ..................... yes
        Qt Network:
          getifaddrs() ........................... yes
          IPv6 ifname ............................ yes
          libproxy ............................... no
          Linux AF_NETLINK ....................... yes
          OpenSSL ................................ yes
            Qt directly linked to OpenSSL ........ no
          OpenSSL 1.1 ............................ yes
          DTLS ................................... yes
          SCTP ................................... no
          Use system proxies ..................... yes
        Qt Gui:
          Accessibility .......................... yes
          FreeType ............................... yes
            Using system FreeType ................ yes
          HarfBuzz ............................... yes
            Using system HarfBuzz ................ yes
          Fontconfig ............................. yes
          Image formats:
            GIF .................................. yes
            ICO .................................. yes
            JPEG ................................. yes
              Using system libjpeg ............... yes
            PNG .................................. yes
              Using system libpng ................ yes
          EGL .................................... no
          OpenVG ................................. no
          OpenGL:
            Desktop OpenGL ....................... no
            OpenGL ES 2.0 ........................ yes
            OpenGL ES 3.0 ........................ yes
            OpenGL ES 3.1 ........................ yes
            OpenGL ES 3.2 ........................ yes
          Vulkan ................................. yes
          Session Management ..................... yes
        Features used by QPA backends:
          evdev .................................. yes
          libinput ............................... yes
          INTEGRITY HID .......................... no
          mtdev .................................. yes
          tslib .................................. yes
          xkbcommon .............................. yes
          X11 specific:
            XLib ................................. yes
            XCB Xlib ............................. yes
            EGL on X11 ........................... no
        QPA backends:
          DirectFB ............................... no
          EGLFS .................................. no
          LinuxFB ................................ yes
          VNC .................................... yes
          Mir client ............................. no
          XCB:
            Using system-provided XCB libraries .. yes
            XCB XKB .............................. yes
            XCB XInput ........................... yes
            Native painting (experimental) ....... yes
            GL integrations:
              GLX Plugin ......................... no
              EGL-X11 Plugin ..................... no
        Qt Sql:
          SQL item models ........................ yes
        Qt Widgets:
          GTK+ ................................... no
          Styles ................................. Fusion Windows
        Qt PrintSupport:
          CUPS ................................... yes
        Qt Sql Drivers:
          DB2 (IBM) .............................. no
          InterBase .............................. no
          MySql .................................. no
          OCI (Oracle) ........................... no
          ODBC ................................... no
          PostgreSQL ............................. yes
          SQLite2 ................................ yes
          SQLite ................................. yes
            Using system provided SQLite ......... no
          TDS (Sybase) ........................... yes
        Qt Testlib:
          Tester for item models ................. yes
        Qt SerialBus:
          Socket CAN ............................. yes
          Socket CAN FD .......................... yes
        Further Image Formats:
          JasPer ................................. no
          MNG .................................... no
          TIFF ................................... yes
            Using system libtiff ................. yes
          WEBP ................................... yes
            Using system libwebp ................. yes
        Qt QML:
          QML network support .................... yes
          QML debugging and profiling support .... yes
          QML sequence object .................... yes
          QML list model ......................... yes
          QML XML http request ................... yes
          QML Locale ............................. yes
          QML delegate model ..................... yes
        Qt Quick:
          Direct3D 12 ............................ no
          AnimatedImage item ..................... yes
          Canvas item ............................ yes
          Support for Qt Quick Designer .......... yes
          Flipable item .......................... yes
          GridView item .......................... yes
          ListView item .......................... yes
          TableView item ......................... yes
          Path support ........................... yes
          PathView item .......................... yes
          Positioner items ....................... yes
          Repeater item .......................... yes
          ShaderEffect item ...................... yes
          Sprite item ............................ yes
        Qt Scxml:
          ECMAScript data model for QtScxml ...... yes
        Qt Gamepad:
          SDL2 ................................... no
        Qt 3D:
          Assimp ................................. yes
          System Assimp .......................... no
          Output Qt3D Job traces ................. no
          Output Qt3D GL traces .................. no
          Use SSE2 instructions .................. no
          Use AVX2 instructions .................. no
          Aspects:
            Render aspect ........................ yes
            Input aspect ......................... yes
            Logic aspect ......................... yes
            Animation aspect ..................... yes
            Extras aspect ........................ yes
        Qt 3D Renderers:
          OpenGL Renderer ........................ yes
        Qt 3D GeometryLoaders:
          Autodesk FBX ........................... no
        Qt Bluetooth:
          BlueZ .................................. no
          BlueZ Low Energy ....................... no
          Linux Crypto API ....................... no
          WinRT Bluetooth API (desktop & UWP) .... no
        Qt Sensors:
          sensorfw ............................... no
        Qt Quick Controls 2:
          Styles ................................. Default Fusion Imagine Material Universal
        Qt Quick Templates 2:
          Hover support .......................... yes
          Multi-touch support .................... yes
        Qt Positioning:
          Gypsy GPS Daemon ....................... no
          WinRT Geolocation API .................. no
        Qt Location:
          Qt.labs.location experimental QML plugin . yes
          Geoservice plugins:
            OpenStreetMap ........................ yes
            HERE ................................. yes
            Esri ................................. yes
            Mapbox ............................... yes
            MapboxGL ............................. yes
            Itemsoverlay ......................... yes
        QtXmlPatterns:
          XML schema support ..................... yes
        Qt Multimedia:
          ALSA ................................... yes
          GStreamer 1.0 .......................... yes
          GStreamer 0.10 ......................... no
          Video for Linux ........................ yes
          OpenAL ................................. no
          PulseAudio ............................. yes
          Resource Policy (libresourceqt5) ....... no
          Windows Audio Services ................. no
          DirectShow ............................. no
          Windows Media Foundation ............... no
        Qt Tools:
          QDoc ................................... no
        Qt WebEngine:
          Embedded build ......................... yes
          Full debug information ................. no
          Pepper Plugins ......................... no
          Printing and PDF ....................... no
          Proprietary Codecs ..................... no
          Spellchecker ........................... yes
          Native Spellchecker .................... no
          WebRTC ................................. no
          Use System Ninja ....................... no
          Geolocation ............................ yes
          WebChannel support ..................... yes
          Use v8 snapshot ........................ yes
          Kerberos Authentication ................ no
          Support qpa-xcb ........................ no
          Building v8 snapshot supported ......... no
          Use ALSA ............................... yes
          Use PulseAudio ......................... yes
          Optional system libraries used:
            re2 .................................. yes
            icu .................................. no
            libwebp, libwebpmux and libwebpdemux . yes
            opus ................................. yes
            ffmpeg ............................... no
            libvpx ............................... no
            snappy ............................... yes
            glib ................................. yes
            zlib ................................. yes
            minizip .............................. yes
            libevent ............................. yes
            jsoncpp .............................. yes
            protobuf ............................. no
            libxml2 and libxslt .................. yes
            lcms2 ................................ no
            png .................................. yes
            JPEG ................................. yes
            harfbuzz ............................. yes
            freetype ............................. yes
          Required system libraries:
            fontconfig ........................... yes
            dbus ................................. yes
            nss .................................. yes
            khr .................................. yes
            glibc ................................ yes
          Required system libraries for qpa-xcb:
            x11 .................................. no
            libdrm ............................... yes
            xcomposite ........................... no
            xcursor .............................. no
            xi ................................... no
            xtst ................................. no
        
        Note: Also available for Linux: linux-clang linux-icc
        
        Note: PKG_CONFIG_LIBDIR automatically set to /opt/qt5opi/sysroot/usr/lib/pkgconfig:/opt/qt5opi/sysroot/usr/share/pkgconfig:/opt/qt5opi/sysroot/usr/lib/arm-linux-gnueabihf/pkgconfig
        
        Note: PKG_CONFIG_SYSROOT_DIR automatically set to /opt/qt5opi/sysroot
        
        WARNING: QDoc will not be compiled, probably because libclang could not be located. This means that you cannot build the Qt documentation.
        
        Either ensure that llvm-config is in your PATH environment variable, or set LLVM_INSTALL_DIR to the location of your llvm installation.
        On Linux systems, you may be able to install libclang by installing the libclang-dev or libclang-devel package, depending on your distribution.
        On macOS, you can use Homebrew's llvm package.
        On Windows, you must set LLVM_INSTALL_DIR to the installation path.
        
        WARNING: flex is required to build QtWebEngine.
        
        Qt is now configured for building. Just run 'make'.
        Once everything is built, you must run 'make install'.
        Qt will be installed into '/opt/qt5opi/sysroot/usr/local/qt5opi'.
        
        Prior to reconfiguration, make sure you remove any leftovers from
        the previous build.
        

        Here is the part that caught my attention.

         Required system libraries for qpa-xcb:
            x11 .................................. no
            libdrm ............................... yes
            xcomposite ........................... no
            xcursor .............................. no
            xi ................................... no
            xtst ................................. no
        

        Could my problem be caused by these?

        1 Reply Last reply
        0
        • SGaistS Offline
          SGaistS Offline
          SGaist
          Lifetime Qt Champion
          wrote on last edited by
          #28

          Did you install the related development libraries on your target device before synchronizing the root filesystem ?

          Interested in AI ? www.idiap.ch
          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

          K 1 Reply Last reply
          0
          • SGaistS SGaist

            Did you install the related development libraries on your target device before synchronizing the root filesystem ?

            K Offline
            K Offline
            kutluyigitturk
            wrote on last edited by
            #29

            @SGaist Yes, I did.

            1 Reply Last reply
            0
            • SGaistS Offline
              SGaistS Offline
              SGaist
              Lifetime Qt Champion
              wrote on last edited by
              #30

              Then you should check the test logs to see exactly what failed with them.

              Interested in AI ? www.idiap.ch
              Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

              K 1 Reply Last reply
              0
              • SGaistS SGaist

                Then you should check the test logs to see exactly what failed with them.

                K Offline
                K Offline
                kutluyigitturk
                wrote on last edited by
                #31

                @SGaist I've already uploaded here what's failing.

                After running the export QT_DEBUG_PLUGINS=1 command, I run the ./OrangeDemoQml command again and add the output below again.

                Please let me know if you can't help...

                QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/qt5opi/plugins/platforms" ...
                QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5opi/plugins/platforms/libqlinuxfb.so"
                Found metadata in lib /usr/local/qt5opi/plugins/platforms/libqlinuxfb.so, metadata=
                {
                    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                    "MetaData": {
                        "Keys": [
                            "linuxfb"
                        ]
                    },
                    "archreq": 0,
                    "className": "QLinuxFbIntegrationPlugin",
                    "debug": false,
                    "version": 330752
                }
                
                
                Got keys from plugin meta data ("linuxfb")
                QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5opi/plugins/platforms/libqminimal.so"
                Found metadata in lib /usr/local/qt5opi/plugins/platforms/libqminimal.so, metadata=
                {
                    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                    "MetaData": {
                        "Keys": [
                            "minimal"
                        ]
                    },
                    "archreq": 0,
                    "className": "QMinimalIntegrationPlugin",
                    "debug": false,
                    "version": 330752
                }
                
                
                Got keys from plugin meta data ("minimal")
                QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5opi/plugins/platforms/libqoffscreen.so"
                Found metadata in lib /usr/local/qt5opi/plugins/platforms/libqoffscreen.so, metadata=
                {
                    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                    "MetaData": {
                        "Keys": [
                            "offscreen"
                        ]
                    },
                    "archreq": 0,
                    "className": "QOffscreenIntegrationPlugin",
                    "debug": false,
                    "version": 330752
                }
                
                
                Got keys from plugin meta data ("offscreen")
                QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5opi/plugins/platforms/libqvnc.so"
                Found metadata in lib /usr/local/qt5opi/plugins/platforms/libqvnc.so, metadata=
                {
                    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                    "MetaData": {
                        "Keys": [
                            "vnc"
                        ]
                    },
                    "archreq": 0,
                    "className": "QVncIntegrationPlugin",
                    "debug": false,
                    "version": 330752
                }
                
                
                Got keys from plugin meta data ("vnc")
                QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5opi/plugins/platforms/libqwebgl.so"
                Found metadata in lib /usr/local/qt5opi/plugins/platforms/libqwebgl.so, metadata=
                {
                    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                    "MetaData": {
                        "Keys": [
                            "webgl"
                        ]
                    },
                    "archreq": 0,
                    "className": "QWebGLIntegrationPlugin",
                    "debug": false,
                    "version": 330752
                }
                
                
                Got keys from plugin meta data ("webgl")
                QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5opi/plugins/platforms/libqxcb.so"
                Found metadata in lib /usr/local/qt5opi/plugins/platforms/libqxcb.so, metadata=
                {
                    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                    "MetaData": {
                        "Keys": [
                            "xcb"
                        ]
                    },
                    "archreq": 0,
                    "className": "QXcbIntegrationPlugin",
                    "debug": false,
                    "version": 330752
                }
                
                
                Got keys from plugin meta data ("xcb")
                QFactoryLoader::QFactoryLoader() checking directory path "/home/opi/platforms" ...
                qt.qpa.plugin: Could not find the Qt platform plugin "eglfs" in ""
                This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
                
                Available platform plugins are: linuxfb, minimal, offscreen, vnc, webgl, xcb.
                
                Aborted
                
                
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                • SGaistS Offline
                  SGaistS Offline
                  SGaist
                  Lifetime Qt Champion
                  wrote on last edited by
                  #32

                  What I meant is to take a look at the tests that have been run during the Qt configure step to see why they failed.

                  Interested in AI ? www.idiap.ch
                  Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                  • SGaistS SGaist

                    What I meant is to take a look at the tests that have been run during the Qt configure step to see why they failed.

                    K Offline
                    K Offline
                    kutluyigitturk
                    wrote on last edited by
                    #33

                    @SGaist Let's throw everything to the wind.

                    The following point caught my attention in the configuration summary.

                    QPA backends:
                      DirectFB ............................... no
                      EGLFS .................................. no
                      LinuxFB ................................ yes
                      VNC .................................... yes
                      Mir client ............................. no
                    

                    If I don't get it wrong, the 'EGLFS ................................................ no' part tells us that EGLFS was not installed. How can I follow a path to install it?

                    JKSHJ 1 Reply Last reply
                    0
                    • K kutluyigitturk

                      @SGaist Let's throw everything to the wind.

                      The following point caught my attention in the configuration summary.

                      QPA backends:
                        DirectFB ............................... no
                        EGLFS .................................. no
                        LinuxFB ................................ yes
                        VNC .................................... yes
                        Mir client ............................. no
                      

                      If I don't get it wrong, the 'EGLFS ................................................ no' part tells us that EGLFS was not installed. How can I follow a path to install it?

                      JKSHJ Offline
                      JKSHJ Offline
                      JKSH
                      Moderators
                      wrote on last edited by
                      #34

                      @kutluyigitturk said in Could not find the Qt platform plugin "eglfs" in "":

                      @SGaist Let's throw everything to the wind.

                      The following point caught my attention in the configuration summary.

                      QPA backends:
                        DirectFB ............................... no
                        EGLFS .................................. no
                        LinuxFB ................................ yes
                        VNC .................................... yes
                        Mir client ............................. no
                      

                      If I don't get it wrong, the 'EGLFS ................................................ no' part tells us that EGLFS was not installed. How can I follow a path to install it?

                      Good work with finding the relevant items in the configure summary!

                      There are other EGL-related items in your log:

                      Qt Gui:
                        EGL .................................... no
                      
                      Features used by QPA backends:
                        X11 specific:
                          EGL on X11 ........................... no
                      
                      QPA backends:
                        EGLFS .................................. no
                        XCB:
                          GL integrations:
                            GLX Plugin ......................... no
                            EGL-X11 Plugin ..................... no
                      

                      Anyway, see item #14 at https://wiki.qt.io/RaspberryPi2EGLFS

                      Qt Doc Search for browsers: forum.qt.io/topic/35616/web-browser-extension-for-improved-doc-searches

                      K 1 Reply Last reply
                      0
                      • JKSHJ JKSH

                        @kutluyigitturk said in Could not find the Qt platform plugin "eglfs" in "":

                        @SGaist Let's throw everything to the wind.

                        The following point caught my attention in the configuration summary.

                        QPA backends:
                          DirectFB ............................... no
                          EGLFS .................................. no
                          LinuxFB ................................ yes
                          VNC .................................... yes
                          Mir client ............................. no
                        

                        If I don't get it wrong, the 'EGLFS ................................................ no' part tells us that EGLFS was not installed. How can I follow a path to install it?

                        Good work with finding the relevant items in the configure summary!

                        There are other EGL-related items in your log:

                        Qt Gui:
                          EGL .................................... no
                        
                        Features used by QPA backends:
                          X11 specific:
                            EGL on X11 ........................... no
                        
                        QPA backends:
                          EGLFS .................................. no
                          XCB:
                            GL integrations:
                              GLX Plugin ......................... no
                              EGL-X11 Plugin ..................... no
                        

                        Anyway, see item #14 at https://wiki.qt.io/RaspberryPi2EGLFS

                        K Offline
                        K Offline
                        kutluyigitturk
                        wrote on last edited by
                        #35

                        @JKSH I looked at the link you mentioned and tried to implement it. But in step 13 echo /usr/local/qt5pi/lib | sudo tee /etc/ld.so.conf.d/qt5pi.conf , I don't have a file named qt5pi.conf or qt5opi.conf. Could I be unable to reach the point I want because of this?

                        By the way, I'm already doing the process in steps 14 during the installation.

                        I'm trying to find where I went wrong. I think it will take a very long time. :/

                        JKSHJ 1 Reply Last reply
                        0
                        • K kutluyigitturk

                          @JKSH I looked at the link you mentioned and tried to implement it. But in step 13 echo /usr/local/qt5pi/lib | sudo tee /etc/ld.so.conf.d/qt5pi.conf , I don't have a file named qt5pi.conf or qt5opi.conf. Could I be unable to reach the point I want because of this?

                          By the way, I'm already doing the process in steps 14 during the installation.

                          I'm trying to find where I went wrong. I think it will take a very long time. :/

                          JKSHJ Offline
                          JKSHJ Offline
                          JKSH
                          Moderators
                          wrote on last edited by
                          #36

                          @kutluyigitturk said in Could not find the Qt platform plugin "eglfs" in "":

                          But in step 13 echo /usr/local/qt5pi/lib | sudo tee /etc/ld.so.conf.d/qt5pi.conf , I don't have a file named qt5pi.conf or qt5opi.conf.

                          The tee command creates a file. The command above writes the string "/usr/local/qt5pi/lib" into a file called qt5pi.conf.

                          By the way, I'm already doing the process in steps 14 during the installation.

                          I'm trying to find where I went wrong. I think it will take a very long time. :/

                          It can be tricky, I know.

                          Take a step back: Don't worry about Qt first; make sure the EGL libraries are working on your device.

                          According to https://github.com/matusnovak/rpi-opengl-without-x you should have libbrcmEGL.so (or libEGL.so) and libbrcmGLESv2.so in /opt/vc/lib. Are the libraries there there? Do the triangle examples work on your device?

                          Qt Doc Search for browsers: forum.qt.io/topic/35616/web-browser-extension-for-improved-doc-searches

                          K 1 Reply Last reply
                          0
                          • JKSHJ JKSH

                            @kutluyigitturk said in Could not find the Qt platform plugin "eglfs" in "":

                            But in step 13 echo /usr/local/qt5pi/lib | sudo tee /etc/ld.so.conf.d/qt5pi.conf , I don't have a file named qt5pi.conf or qt5opi.conf.

                            The tee command creates a file. The command above writes the string "/usr/local/qt5pi/lib" into a file called qt5pi.conf.

                            By the way, I'm already doing the process in steps 14 during the installation.

                            I'm trying to find where I went wrong. I think it will take a very long time. :/

                            It can be tricky, I know.

                            Take a step back: Don't worry about Qt first; make sure the EGL libraries are working on your device.

                            According to https://github.com/matusnovak/rpi-opengl-without-x you should have libbrcmEGL.so (or libEGL.so) and libbrcmGLESv2.so in /opt/vc/lib. Are the libraries there there? Do the triangle examples work on your device?

                            K Offline
                            K Offline
                            kutluyigitturk
                            wrote on last edited by
                            #37

                            @JKSH said in Could not find the Qt platform plugin "eglfs" in "":

                            @kutluyigitturk said in Could not find the Qt platform plugin "eglfs" in "":

                            But in step 13 echo /usr/local/qt5pi/lib | sudo tee /etc/ld.so.conf.d/qt5pi.conf , I don't have a file named qt5pi.conf or qt5opi.conf.

                            The tee command creates a file. The command above writes the string "/usr/local/qt5pi/lib" into a file called qt5pi.conf.

                            Good of you to say, I didn't know this worked. I ran this command and got no errors.

                            By the way, I'm already doing the process in steps 14 during the installation.

                            I'm trying to find where I went wrong. I think it will take a very long time. :/

                            It can be tricky, I know.

                            Take a step back: Don't worry about Qt first; make sure the EGL libraries are working on your device.

                            According to https://github.com/matusnovak/rpi-opengl-without-x you should have libbrcmEGL.so (or libEGL.so) and libbrcmGLESv2.so in /opt/vc/lib. Are the libraries there there? Do the triangle examples work on your device?

                            First of all, there is no /opt/vc/lib directory on Orange Pi. I created this myself and downloaded the necessary links via the 'https://github.com/raspberrypi/firmware/tree/master/opt/vc/lib' link. Then I flashed this lib folder and put it on Orange Pi. Then I copied the .so files to the required directory with the cp -r command.

                            Could doing it this way cause any problems?

                            I downloaded the file from the link 'https://github.com/matusnovak/rpi-opengl-without-x' back to a flash drive. I saved the 5 files in it in a folder named example on the desktop. When I run gcc -o triangle triangle.o -lbrcmEGL -lbrcmGLESv2 -L/opt/vc/lib I get the following error.

                            root@orangepione:/home/opi/Desktop/example# gcc -o triangle triangle.o -lbrcmEGL -lbrcmGLESv2 -L/opt/vc/lib
                            /usr/bin/ld: warning: libbcm_host.so, needed by /opt/vc/lib/libbrcmEGL.so, not found (try using -rpath or -rpath-link)
                            /usr/bin/ld: warning: libvchiq_arm.so, needed by /opt/vc/lib/libbrcmEGL.so, not found (try using -rpath or -rpath-link)
                            /usr/bin/ld: warning: libvcos.so, needed by /opt/vc/lib/libbrcmEGL.so, not found (try using -rpath or -rpath-link)
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vcos_log_impl'
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vcos_generic_mem_free'
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vc_dispmanx_display_get_info'
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vchiq_connect'
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vcos_generic_reentrant_mutex_lock'
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vcos_thread_at_exit'
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vchiq_initialise'
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vcos_generic_reentrant_mutex_delete'
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vchiq_release_message'
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vchiq_get_client_id'
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vc_dispmanx_element_add'
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vcos_generic_reentrant_mutex_unlock'
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vchiq_queue_message'
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vchiu_queue_init'
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vcos_snprintf'
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vchiu_queue_push'
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vcos_named_semaphore_delete'
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vcos_log_register'
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vcos_generic_mem_alloc'
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vc_dispmanx_display_open'
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vc_dispmanx_update_start'
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vcos_pthreads_map_errno'
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vcos_generic_reentrant_mutex_create'
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vchiq_queue_bulk_receive'
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vchiq_queue_bulk_transmit'
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vcos_generic_named_semaphore_create'
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vchiq_open_service'
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vcos_log_unregister'
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vchiu_queue_pop'
                            /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vc_dispmanx_update_submit_sync'
                            collect2: error: ld returned 1 exit status
                            
                            JKSHJ 1 Reply Last reply
                            0
                            • K Offline
                              K Offline
                              kutluyigitturk
                              wrote on last edited by
                              #38

                              @JKSH @SGaist Hello again, I'm back with another thought.

                              As in Raspberry Pi, /opt/vc/lib directory does not occur between Orange Pi directories. I created this directory manually in Orange Pi. I am also copying the files in the directory from the /opt/vc/lib folder within the Raspberry Pi ecosystem to a Flash Drive.

                              cp -rL /opt/vc/lib /media/pi/SANDISK
                              

                              Then I insert this memory into Orange Pi and copy it to the /opt/vc/lib directory I created in the Orange Pi ecosystem.

                              cp -r /media/pi/SANDISK /opt/vc
                              

                              But between two different directories, different views emerge as I added in the photo below. The libGLESv1_CM.so file I show with the red frame looks different between directories.
                              2021-09-02-104450_1920x1080_scrot.png

                              Could my process be incorrect? How accurate is it to copy like this? This is where my error most likely stems from.

                              1 Reply Last reply
                              0
                              • K kutluyigitturk

                                @JKSH I am creating the folder named /qt5opi in the /usr/local directory. I create with this command, sudo mkdir /usr/local/qt5opi . You can see the same process when you open the 14th minute of the video.

                                When I execute this command ./OrangeDemoQml -platform xcb I get a very similar error.

                                ./OrangeDemoQml -platform xcb is the error I get when I execute this command:

                                qt.qpa.xcb: could not connect to display 
                                qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
                                This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
                                
                                Available platform plugins are: linuxfb, minimal, offscreen, vnc, webgl, xcb.
                                
                                Aborted
                                

                                Errors I get after running export QT_DEBUG_PLUGINS=1

                                QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/qt5opi/plugins/platforms" ...
                                QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5opi/plugins/platforms/libqlinuxfb.so"
                                Found metadata in lib /usr/local/qt5opi/plugins/platforms/libqlinuxfb.so, metadata=
                                {
                                    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                                    "MetaData": {
                                        "Keys": [
                                            "linuxfb"
                                        ]
                                    },
                                    "archreq": 0,
                                    "className": "QLinuxFbIntegrationPlugin",
                                    "debug": false,
                                    "version": 331520
                                }
                                
                                
                                Got keys from plugin meta data ("linuxfb")
                                QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5opi/plugins/platforms/libqminimal.so"
                                Found metadata in lib /usr/local/qt5opi/plugins/platforms/libqminimal.so, metadata=
                                {
                                    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                                    "MetaData": {
                                        "Keys": [
                                            "minimal"
                                        ]
                                    },
                                    "archreq": 0,
                                    "className": "QMinimalIntegrationPlugin",
                                    "debug": false,
                                    "version": 331520
                                }
                                
                                
                                Got keys from plugin meta data ("minimal")
                                QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5opi/plugins/platforms/libqoffscreen.so"
                                Found metadata in lib /usr/local/qt5opi/plugins/platforms/libqoffscreen.so, metadata=
                                {
                                    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                                    "MetaData": {
                                        "Keys": [
                                            "offscreen"
                                        ]
                                    },
                                    "archreq": 0,
                                    "className": "QOffscreenIntegrationPlugin",
                                    "debug": false,
                                    "version": 331520
                                }
                                
                                
                                Got keys from plugin meta data ("offscreen")
                                QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5opi/plugins/platforms/libqvnc.so"
                                Found metadata in lib /usr/local/qt5opi/plugins/platforms/libqvnc.so, metadata=
                                {
                                    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                                    "MetaData": {
                                        "Keys": [
                                            "vnc"
                                        ]
                                    },
                                    "archreq": 0,
                                    "className": "QVncIntegrationPlugin",
                                    "debug": false,
                                    "version": 331520
                                }
                                
                                
                                Got keys from plugin meta data ("vnc")
                                QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5opi/plugins/platforms/libqwebgl.so"
                                Found metadata in lib /usr/local/qt5opi/plugins/platforms/libqwebgl.so, metadata=
                                {
                                    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                                    "MetaData": {
                                        "Keys": [
                                            "webgl"
                                        ]
                                    },
                                    "archreq": 0,
                                    "className": "QWebGLIntegrationPlugin",
                                    "debug": false,
                                    "version": 331520
                                }
                                
                                
                                Got keys from plugin meta data ("webgl")
                                QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5opi/plugins/platforms/libqxcb.so"
                                Found metadata in lib /usr/local/qt5opi/plugins/platforms/libqxcb.so, metadata=
                                {
                                    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                                    "MetaData": {
                                        "Keys": [
                                            "xcb"
                                        ]
                                    },
                                    "archreq": 0,
                                    "className": "QXcbIntegrationPlugin",
                                    "debug": false,
                                    "version": 331520
                                }
                                
                                
                                Got keys from plugin meta data ("xcb")
                                QFactoryLoader::QFactoryLoader() checking directory path "/home/opi/platforms" ...
                                loaded library "/usr/local/qt5opi/plugins/platforms/libqxcb.so"
                                qt.qpa.xcb: could not connect to display 
                                qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
                                This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
                                
                                Available platform plugins are: linuxfb, minimal, offscreen, vnc, webgl, xcb.
                                
                                Aborted
                                
                                
                                B Offline
                                B Offline
                                bumankumar3
                                wrote on last edited by bumankumar3
                                #39

                                @kutluyigitturk I have the same issue. Any tips for solution?

                                teatv apk
                                spice money

                                K 1 Reply Last reply
                                0
                                • K kutluyigitturk

                                  @JKSH said in Could not find the Qt platform plugin "eglfs" in "":

                                  @kutluyigitturk said in Could not find the Qt platform plugin "eglfs" in "":

                                  But in step 13 echo /usr/local/qt5pi/lib | sudo tee /etc/ld.so.conf.d/qt5pi.conf , I don't have a file named qt5pi.conf or qt5opi.conf.

                                  The tee command creates a file. The command above writes the string "/usr/local/qt5pi/lib" into a file called qt5pi.conf.

                                  Good of you to say, I didn't know this worked. I ran this command and got no errors.

                                  By the way, I'm already doing the process in steps 14 during the installation.

                                  I'm trying to find where I went wrong. I think it will take a very long time. :/

                                  It can be tricky, I know.

                                  Take a step back: Don't worry about Qt first; make sure the EGL libraries are working on your device.

                                  According to https://github.com/matusnovak/rpi-opengl-without-x you should have libbrcmEGL.so (or libEGL.so) and libbrcmGLESv2.so in /opt/vc/lib. Are the libraries there there? Do the triangle examples work on your device?

                                  First of all, there is no /opt/vc/lib directory on Orange Pi. I created this myself and downloaded the necessary links via the 'https://github.com/raspberrypi/firmware/tree/master/opt/vc/lib' link. Then I flashed this lib folder and put it on Orange Pi. Then I copied the .so files to the required directory with the cp -r command.

                                  Could doing it this way cause any problems?

                                  I downloaded the file from the link 'https://github.com/matusnovak/rpi-opengl-without-x' back to a flash drive. I saved the 5 files in it in a folder named example on the desktop. When I run gcc -o triangle triangle.o -lbrcmEGL -lbrcmGLESv2 -L/opt/vc/lib I get the following error.

                                  root@orangepione:/home/opi/Desktop/example# gcc -o triangle triangle.o -lbrcmEGL -lbrcmGLESv2 -L/opt/vc/lib
                                  /usr/bin/ld: warning: libbcm_host.so, needed by /opt/vc/lib/libbrcmEGL.so, not found (try using -rpath or -rpath-link)
                                  /usr/bin/ld: warning: libvchiq_arm.so, needed by /opt/vc/lib/libbrcmEGL.so, not found (try using -rpath or -rpath-link)
                                  /usr/bin/ld: warning: libvcos.so, needed by /opt/vc/lib/libbrcmEGL.so, not found (try using -rpath or -rpath-link)
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vcos_log_impl'
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vcos_generic_mem_free'
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vc_dispmanx_display_get_info'
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vchiq_connect'
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vcos_generic_reentrant_mutex_lock'
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vcos_thread_at_exit'
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vchiq_initialise'
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vcos_generic_reentrant_mutex_delete'
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vchiq_release_message'
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vchiq_get_client_id'
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vc_dispmanx_element_add'
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vcos_generic_reentrant_mutex_unlock'
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vchiq_queue_message'
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vchiu_queue_init'
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vcos_snprintf'
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vchiu_queue_push'
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vcos_named_semaphore_delete'
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vcos_log_register'
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vcos_generic_mem_alloc'
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vc_dispmanx_display_open'
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vc_dispmanx_update_start'
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vcos_pthreads_map_errno'
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vcos_generic_reentrant_mutex_create'
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vchiq_queue_bulk_receive'
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vchiq_queue_bulk_transmit'
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vcos_generic_named_semaphore_create'
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vchiq_open_service'
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vcos_log_unregister'
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vchiu_queue_pop'
                                  /usr/bin/ld: /opt/vc/lib/libbrcmEGL.so: undefined reference to `vc_dispmanx_update_submit_sync'
                                  collect2: error: ld returned 1 exit status
                                  
                                  JKSHJ Offline
                                  JKSHJ Offline
                                  JKSH
                                  Moderators
                                  wrote on last edited by
                                  #40

                                  @kutluyigitturk said in Could not find the Qt platform plugin "eglfs" in "":

                                  First of all, there is no /opt/vc/lib directory on Orange Pi. I created this myself and downloaded the necessary links via the 'https://github.com/raspberrypi/firmware/tree/master/opt/vc/lib' link. Then I flashed this lib folder and put it on Orange Pi. Then I copied the .so files to the required directory with the cp -r command.

                                  Could doing it this way cause any problems?

                                  Are you sure that the *.so versions at https://github.com/raspberrypi/firmware/tree/master/opt/vc/lib are compatible with the rest of your system?

                                  /usr/bin/ld: warning: libbcm_host.so, needed by /opt/vc/lib/libbrcmEGL.so, not found (try using -rpath or -rpath-link)

                                  You have missing dependencies. You need to find libbcm_host.so, like the message said.

                                  But between two different directories, different views emerge as I added in the photo below. The libGLESv1_CM.so file I show with the red frame looks different between directories.

                                  It looks like you have lost a symbolic link. Call ls -l to see the differences more clearly.

                                  When I copy files that include symbolic links, I use cp -a.

                                  Anyway, your issues are not Qt-related. I don't have experience with setting up a Raspberry Pi, so I'm not sure how much I can help you.

                                  I suggest you seek help at a Raspberry Pi forum first. Make sure that you can run the examples at https://github.com/matusnovak/rpi-opengl-without-x first.

                                  After that, you can try building Qt and the EGLFS plugin again.

                                  Good luck.

                                  Qt Doc Search for browsers: forum.qt.io/topic/35616/web-browser-extension-for-improved-doc-searches

                                  K 1 Reply Last reply
                                  0
                                  • JKSHJ JKSH

                                    @kutluyigitturk said in Could not find the Qt platform plugin "eglfs" in "":

                                    First of all, there is no /opt/vc/lib directory on Orange Pi. I created this myself and downloaded the necessary links via the 'https://github.com/raspberrypi/firmware/tree/master/opt/vc/lib' link. Then I flashed this lib folder and put it on Orange Pi. Then I copied the .so files to the required directory with the cp -r command.

                                    Could doing it this way cause any problems?

                                    Are you sure that the *.so versions at https://github.com/raspberrypi/firmware/tree/master/opt/vc/lib are compatible with the rest of your system?

                                    /usr/bin/ld: warning: libbcm_host.so, needed by /opt/vc/lib/libbrcmEGL.so, not found (try using -rpath or -rpath-link)

                                    You have missing dependencies. You need to find libbcm_host.so, like the message said.

                                    But between two different directories, different views emerge as I added in the photo below. The libGLESv1_CM.so file I show with the red frame looks different between directories.

                                    It looks like you have lost a symbolic link. Call ls -l to see the differences more clearly.

                                    When I copy files that include symbolic links, I use cp -a.

                                    Anyway, your issues are not Qt-related. I don't have experience with setting up a Raspberry Pi, so I'm not sure how much I can help you.

                                    I suggest you seek help at a Raspberry Pi forum first. Make sure that you can run the examples at https://github.com/matusnovak/rpi-opengl-without-x first.

                                    After that, you can try building Qt and the EGLFS plugin again.

                                    Good luck.

                                    K Offline
                                    K Offline
                                    kutluyigitturk
                                    wrote on last edited by
                                    #41

                                    @JKSH Thank you for your help.

                                    1 Reply Last reply
                                    0
                                    • B bumankumar3

                                      @kutluyigitturk I have the same issue. Any tips for solution?

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                                      spice money

                                      K Offline
                                      K Offline
                                      kutluyigitturk
                                      wrote on last edited by
                                      #42

                                      @bumankumar3 I'll let you know if I can fix the problem.

                                      1 Reply Last reply
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