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  4. [SOLVED] qt.qpa.plugin: Could not find the Qt platform plugin "xcb" in ""
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[SOLVED] qt.qpa.plugin: Could not find the Qt platform plugin "xcb" in ""

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  • H hskoglund
    13 Feb 2020, 17:52

    No worries, there are other ways of setting the path, for example you could try exporting it as an environment variable, say like this:

    export QT_PLUGIN_PATH=/usr/lib/qt/plugins
    urh
    

    If that doesn't work, also you can specify the path to libqxcb.so with a command argument to urh, like this:

    urh -platformpluginpath /usr/lib/qt/plugins/platforms
    

    (Note: this 2nd example only helps out with locating libqxcb.so, i.e. if urh needs more plugins to be loaded (and the 1st example above doesn't work) your still out of luck.)

    M Offline
    M Offline
    mol_
    wrote on 11 Aug 2020, 03:13 last edited by mol_ 8 Nov 2020, 03:15
    #15

    @hskoglund thank you, I have tried your mentioned method and it works well.

    export QT_PLUGIN_PATH=/usr/lib/qt/plugins
    
    1 Reply Last reply
    0
    • S Offline
      S Offline
      superdummy
      wrote on 22 Feb 2021, 12:51 last edited by
      #16

      Hi,
      I experienced this problem on Debian 10 Buster after upgrading my Qt to 5.15.2 and QtCreator to 14.0
      In the end the lib libxcb-util.so.1 was missing.

      ldd /home/developer/Qt5/5.15.2/gcc_64/plugins/platforms/libqxcb.so
      ...
      libxcb-util.so.1 => not found
      ...
      

      See here: https://bugreports.qt.io/browse/QTBUG-88688

      A 1 Reply Last reply 3 Mar 2021, 21:24
      1
      • S superdummy
        22 Feb 2021, 12:51

        Hi,
        I experienced this problem on Debian 10 Buster after upgrading my Qt to 5.15.2 and QtCreator to 14.0
        In the end the lib libxcb-util.so.1 was missing.

        ldd /home/developer/Qt5/5.15.2/gcc_64/plugins/platforms/libqxcb.so
        ...
        libxcb-util.so.1 => not found
        ...
        

        See here: https://bugreports.qt.io/browse/QTBUG-88688

        A Offline
        A Offline
        andreionea
        wrote on 3 Mar 2021, 21:24 last edited by
        #17

        @superdummy worked for me

        1 Reply Last reply
        0
        • L Offline
          L Offline
          LiZheCN
          wrote on 29 Jan 2022, 14:03 last edited by LiZheCN
          #18

          I stuck at this issue too.

          I set the environment variable export QT_PLUGIN_PATH=/usr/lib/qt/plugins.
          but not work.

          I run a python script use pyqt. Get the error message:

          QObject::moveToThread: Current thread (0x55e4e5df2060) is not the object's thread (0x55e4e61624e0).
          Cannot move to target thread (0x55e4e5df2060)
          
          qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "/home/lizhe/.local/lib/python3.10/site-packages/cv2/qt/plugins" 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: xcb, eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx.
          
          Aborted (core dumped)
          

          There is a file /home/lizhe/.local/lib/python3.10/site-packages/cv2/qt/plugins/platforms/libqxcb.so I move the libqxcb.so in upper dir, not work either.

          output of ldd /usr/lib/qt/plugins/platforms/libqxcb.so

          
          	linux-vdso.so.1 (0x00007ffe049cc000)
          	libQt5XcbQpa.so.5 => /usr/lib/libQt5XcbQpa.so.5 (0x00007f11af265000)
          	libQt5Gui.so.5 => /usr/lib/libQt5Gui.so.5 (0x00007f11aebff000)
          	libQt5Core.so.5 => /usr/lib/libQt5Core.so.5 (0x00007f11ae6e1000)
          	libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00007f11ae4cb000)
          	libc.so.6 => /usr/lib/libc.so.6 (0x00007f11ae2ff000)
          	libfontconfig.so.1 => /usr/lib/libfontconfig.so.1 (0x00007f11ae2b0000)
          	libfreetype.so.6 => /usr/lib/libfreetype.so.6 (0x00007f11ae1e3000)
          	libQt5DBus.so.5 => /usr/lib/libQt5DBus.so.5 (0x00007f11ae163000)
          	libpthread.so.0 => /usr/lib/libpthread.so.0 (0x00007f11ae142000)
          	libX11-xcb.so.1 => /usr/lib/libX11-xcb.so.1 (0x00007f11ae13d000)
          	libxcb-icccm.so.4 => /usr/lib/libxcb-icccm.so.4 (0x00007f11ae137000)
          	libxcb-image.so.0 => /usr/lib/libxcb-image.so.0 (0x00007f11ae131000)
          	libxcb-shm.so.0 => /usr/lib/libxcb-shm.so.0 (0x00007f11ae12a000)
          	libxcb-keysyms.so.1 => /usr/lib/libxcb-keysyms.so.1 (0x00007f11ae125000)
          	libxcb-randr.so.0 => /usr/lib/libxcb-randr.so.0 (0x00007f11ae113000)
          	libxcb-render-util.so.0 => /usr/lib/libxcb-render-util.so.0 (0x00007f11ae10d000)
          	libxcb-render.so.0 => /usr/lib/libxcb-render.so.0 (0x00007f11ae0fd000)
          	libxcb-shape.so.0 => /usr/lib/libxcb-shape.so.0 (0x00007f11ae0f8000)
          	libxcb-sync.so.1 => /usr/lib/libxcb-sync.so.1 (0x00007f11ae0ec000)
          	libxcb-xfixes.so.0 => /usr/lib/libxcb-xfixes.so.0 (0x00007f11ae0e2000)
          	libxcb-xinerama.so.0 => /usr/lib/libxcb-xinerama.so.0 (0x00007f11ae0dd000)
          	libxcb-xkb.so.1 => /usr/lib/libxcb-xkb.so.1 (0x00007f11ae0bf000)
          	libxcb-xinput.so.0 => /usr/lib/libxcb-xinput.so.0 (0x00007f11ae09a000)
          	libxcb.so.1 => /usr/lib/libxcb.so.1 (0x00007f11ae070000)
          	libX11.so.6 => /usr/lib/libX11.so.6 (0x00007f11adf2c000)
          	libSM.so.6 => /usr/lib/libSM.so.6 (0x00007f11adf22000)
          	libICE.so.6 => /usr/lib/libICE.so.6 (0x00007f11adf05000)
          	libxkbcommon-x11.so.0 => /usr/lib/libxkbcommon-x11.so.0 (0x00007f11adefb000)
          	libxkbcommon.so.0 => /usr/lib/libxkbcommon.so.0 (0x00007f11adeb2000)
          	libglib-2.0.so.0 => /usr/lib/libglib-2.0.so.0 (0x00007f11add76000)
          	libm.so.6 => /usr/lib/libm.so.6 (0x00007f11adc30000)
          	libgcc_s.so.1 => /usr/lib/libgcc_s.so.1 (0x00007f11adc15000)
          	libGL.so.1 => /usr/lib/libGL.so.1 (0x00007f11adb8f000)
          	libpng16.so.16 => /usr/lib/libpng16.so.16 (0x00007f11adb58000)
          	libz.so.1 => /usr/lib/libz.so.1 (0x00007f11adb3e000)
          	libharfbuzz.so.0 => /usr/lib/libharfbuzz.so.0 (0x00007f11ada65000)
          	libmd4c.so.0 => /usr/lib/libmd4c.so.0 (0x00007f11ada4d000)
          	libsystemd.so.0 => /usr/lib/libsystemd.so.0 (0x00007f11ad971000)
          	libdouble-conversion.so.3 => /usr/lib/libdouble-conversion.so.3 (0x00007f11ad95b000)
          	libicui18n.so.70 => /usr/lib/libicui18n.so.70 (0x00007f11ad635000)
          	libicuuc.so.70 => /usr/lib/libicuuc.so.70 (0x00007f11ad439000)
          	libdl.so.2 => /usr/lib/libdl.so.2 (0x00007f11ad432000)
          	libpcre2-16.so.0 => /usr/lib/libpcre2-16.so.0 (0x00007f11ad3a3000)
          	libzstd.so.1 => /usr/lib/libzstd.so.1 (0x00007f11ad2cc000)
          	/usr/lib64/ld-linux-x86-64.so.2 (0x00007f11af3c5000)
          	libexpat.so.1 => /usr/lib/libexpat.so.1 (0x00007f11ad29c000)
          	libbz2.so.1.0 => /usr/lib/libbz2.so.1.0 (0x00007f11ad289000)
          	libbrotlidec.so.1 => /usr/lib/libbrotlidec.so.1 (0x00007f11ad27b000)
          	libdbus-1.so.3 => /usr/lib/libdbus-1.so.3 (0x00007f11ad224000)
          	libxcb-util.so.1 => /usr/lib/libxcb-util.so.1 (0x00007f11ad21c000)
          	libXau.so.6 => /usr/lib/libXau.so.6 (0x00007f11ad217000)
          	libXdmcp.so.6 => /usr/lib/libXdmcp.so.6 (0x00007f11ad20f000)
          	libuuid.so.1 => /usr/lib/libuuid.so.1 (0x00007f11ad206000)
          	libpcre.so.1 => /usr/lib/libpcre.so.1 (0x00007f11ad18d000)
          	libGLdispatch.so.0 => /usr/lib/libGLdispatch.so.0 (0x00007f11ad0d5000)
          	libGLX.so.0 => /usr/lib/libGLX.so.0 (0x00007f11ad0a2000)
          	libgraphite2.so.3 => /usr/lib/libgraphite2.so.3 (0x00007f11ad07d000)
          	librt.so.1 => /usr/lib/librt.so.1 (0x00007f11ad072000)
          	liblzma.so.5 => /usr/lib/liblzma.so.5 (0x00007f11ad047000)
          	liblz4.so.1 => /usr/lib/liblz4.so.1 (0x00007f11ad024000)
          	libcap.so.2 => /usr/lib/libcap.so.2 (0x00007f11ad018000)
          	libgcrypt.so.20 => /usr/lib/libgcrypt.so.20 (0x00007f11acedc000)
          	libicudata.so.70 => /usr/lib/libicudata.so.70 (0x00007f11ab2c0000)
          	libbrotlicommon.so.1 => /usr/lib/libbrotlicommon.so.1 (0x00007f11ab29b000)
          	libgpg-error.so.0 => /usr/lib/libgpg-error.so.0 (0x00007f11ab273000)
          

          System information:

           OS: Manjaro 21.2.2 Qonos
           Kernel: x86_64 Linux 5.15.16-1-MANJARO
           Uptime: 5h 18m
           Packages: 1396
           Shell: fish 3.3.1
           Resolution: 3840x1080
           DE: KDE5 / Plasma
           WM: KWin
           GTK Theme: Breeze [GTK2/3]
           Icon Theme: breeze-dark
           Disk: 31G / 236G (14%)
           CPU: Intel Core i7-7700K @ 8x 4.5GHz [44.0°C]
           GPU: Intel Corporation HD Graphics 630 (rev 04)
           RAM: 6722MiB / 15866MiB
           Python 3.10.1
          
          1 Reply Last reply
          0
          • H Offline
            H Offline
            hskoglund
            wrote on 29 Jan 2022, 14:26 last edited by
            #19

            Hi, do you get the same error if you try a vanilla Hello World python app?
            Say like this:

            app = QApplication(sys,argv)
            window = QWidget()
            window.setWindowTitle('Hello world')
            window.setGeometry(100, 100, 640, 480)
            window.show()
            sys.exit(app.exec_())
            
            L 2 Replies Last reply 30 Jan 2022, 01:35
            0
            • H hskoglund
              29 Jan 2022, 14:26

              Hi, do you get the same error if you try a vanilla Hello World python app?
              Say like this:

              app = QApplication(sys,argv)
              window = QWidget()
              window.setWindowTitle('Hello world')
              window.setGeometry(100, 100, 640, 480)
              window.show()
              sys.exit(app.exec_())
              
              L Offline
              L Offline
              LiZheCN
              wrote on 30 Jan 2022, 01:35 last edited by
              #20

              @hskoglund Without reboot a simple qt hello world project can run. After reboot every thing goes fine. Thank you for you time.

              1 Reply Last reply
              0
              • H hskoglund
                29 Jan 2022, 14:26

                Hi, do you get the same error if you try a vanilla Hello World python app?
                Say like this:

                app = QApplication(sys,argv)
                window = QWidget()
                window.setWindowTitle('Hello world')
                window.setGeometry(100, 100, 640, 480)
                window.show()
                sys.exit(app.exec_())
                
                L Offline
                L Offline
                LiZheCN
                wrote on 31 Jan 2022, 09:45 last edited by LiZheCN
                #21

                @hskoglund Sorry to bother you again, the issue keep coming out after somethime. And I dont know how to solve it, for now.
                I cant start my kate(build-in editor in manajaro)
                26e0c01d-09b7-42dc-8aed-b5f01ba146cc-image.png

                And the error message is:

                QObject::moveToThread: Current thread (0x55b676c29770) is not the object's thread (0x55b676c337c0).
                Cannot move to target thread (0x55b676c29770)
                
                qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "/home/lizhe/.local/lib/python3.10/site-packages/cv2/qt/plugins" 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: xcb, eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx.
                
                fish: Job 1, 'kate' terminated by signal SIGABRT (Abort)
                

                After the reboot the issue is gone for just a while. How to solve it?

                My system info is:

                 OS: Manjaro 21.2.2 Qonos
                 Kernel: x86_64 Linux 5.15.16-1-MANJARO
                 Uptime: 8h 2m
                 Packages: 1397
                 Shell: python
                 Resolution: 3840x1080
                 DE: KDE5 / Plasma 
                 WM: KWin
                 GTK Theme: Breeze [GTK2/3]
                 Icon Theme: breeze-dark
                 Disk: 33G / 236G (15%)
                 CPU: Intel Core i7-7700K @ 8x 4.5GHz [56.0°C]
                 GPU: Intel Corporation HD Graphics 630 (rev 04)
                 RAM: 7016MiB / 15866MiB
                
                Python 3.10.1
                
                NVIM v0.6.1
                Build type: Release
                LuaJIT 2.0.5
                Compiled by builduser
                
                Features: +acl +iconv +tui
                See ":help feature-compile"
                
                   system vimrc file: "$VIM/sysinit.vim"
                  fall-back for $VIM: "/usr/share/nvim"
                
                Run :checkhealth for more info
                
                alacritty 0.9.0 (fed349aa)
                
                

                See if you need other info?

                jsulmJ 1 Reply Last reply 31 Jan 2022, 09:51
                0
                • L LiZheCN
                  31 Jan 2022, 09:45

                  @hskoglund Sorry to bother you again, the issue keep coming out after somethime. And I dont know how to solve it, for now.
                  I cant start my kate(build-in editor in manajaro)
                  26e0c01d-09b7-42dc-8aed-b5f01ba146cc-image.png

                  And the error message is:

                  QObject::moveToThread: Current thread (0x55b676c29770) is not the object's thread (0x55b676c337c0).
                  Cannot move to target thread (0x55b676c29770)
                  
                  qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "/home/lizhe/.local/lib/python3.10/site-packages/cv2/qt/plugins" 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: xcb, eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx.
                  
                  fish: Job 1, 'kate' terminated by signal SIGABRT (Abort)
                  

                  After the reboot the issue is gone for just a while. How to solve it?

                  My system info is:

                   OS: Manjaro 21.2.2 Qonos
                   Kernel: x86_64 Linux 5.15.16-1-MANJARO
                   Uptime: 8h 2m
                   Packages: 1397
                   Shell: python
                   Resolution: 3840x1080
                   DE: KDE5 / Plasma 
                   WM: KWin
                   GTK Theme: Breeze [GTK2/3]
                   Icon Theme: breeze-dark
                   Disk: 33G / 236G (15%)
                   CPU: Intel Core i7-7700K @ 8x 4.5GHz [56.0°C]
                   GPU: Intel Corporation HD Graphics 630 (rev 04)
                   RAM: 7016MiB / 15866MiB
                  
                  Python 3.10.1
                  
                  NVIM v0.6.1
                  Build type: Release
                  LuaJIT 2.0.5
                  Compiled by builduser
                  
                  Features: +acl +iconv +tui
                  See ":help feature-compile"
                  
                     system vimrc file: "$VIM/sysinit.vim"
                    fall-back for $VIM: "/usr/share/nvim"
                  
                  Run :checkhealth for more info
                  
                  alacritty 0.9.0 (fed349aa)
                  
                  

                  See if you need other info?

                  jsulmJ Offline
                  jsulmJ Offline
                  jsulm
                  Lifetime Qt Champion
                  wrote on 31 Jan 2022, 09:51 last edited by
                  #22

                  @LiZheCN said in [SOLVED] qt.qpa.plugin: Could not find the Qt platform plugin "xcb" in "":

                  How to solve it?

                  Set QT_DEBUG_PLUGINS to one before starting the app:

                  export QT_DEBUG_PLUGINS=1
                  kate
                  

                  Post the output.

                  https://forum.qt.io/topic/113070/qt-code-of-conduct

                  L 1 Reply Last reply 31 Jan 2022, 11:01
                  0
                  • jsulmJ jsulm
                    31 Jan 2022, 09:51

                    @LiZheCN said in [SOLVED] qt.qpa.plugin: Could not find the Qt platform plugin "xcb" in "":

                    How to solve it?

                    Set QT_DEBUG_PLUGINS to one before starting the app:

                    export QT_DEBUG_PLUGINS=1
                    kate
                    

                    Post the output.

                    L Offline
                    L Offline
                    LiZheCN
                    wrote on 31 Jan 2022, 11:01 last edited by
                    #23

                    @jsulm

                    The log is too long I put it on this site. Thank you

                    https://github.com/woshichuanqilz/others/blob/master/log

                    jsulmJ 1 Reply Last reply 31 Jan 2022, 11:10
                    0
                    • L LiZheCN
                      31 Jan 2022, 11:01

                      @jsulm

                      The log is too long I put it on this site. Thank you

                      https://github.com/woshichuanqilz/others/blob/master/log

                      jsulmJ Offline
                      jsulmJ Offline
                      jsulm
                      Lifetime Qt Champion
                      wrote on 31 Jan 2022, 11:10 last edited by
                      #24

                      @LiZheCN This looks very strange:

                      Got keys from plugin meta data ("xcb")
                      QFactoryLoader::QFactoryLoader() checking directory path "/usr/bin/platforms" ...
                      loaded library "/home/lizhe/.local/lib/python3.10/site-packages/cv2/qt/plugins/platforms/libqxcb.so"
                      QObject::moveToThread: Current thread (0x563183178770) is not the object's thread (0x563183184ca0).
                      Cannot move to target thread (0x563183178770)
                      

                      All other plug-ins are loaded from /usr/lib/qt/plugins, not /home/lizhe/.local/lib/python3.10/site-packages/cv2/qt/plugins
                      Do you have /home/lizhe/.local/lib/python3.10 in your PATH?

                      https://forum.qt.io/topic/113070/qt-code-of-conduct

                      L 1 Reply Last reply 31 Jan 2022, 11:22
                      0
                      • jsulmJ jsulm
                        31 Jan 2022, 11:10

                        @LiZheCN This looks very strange:

                        Got keys from plugin meta data ("xcb")
                        QFactoryLoader::QFactoryLoader() checking directory path "/usr/bin/platforms" ...
                        loaded library "/home/lizhe/.local/lib/python3.10/site-packages/cv2/qt/plugins/platforms/libqxcb.so"
                        QObject::moveToThread: Current thread (0x563183178770) is not the object's thread (0x563183184ca0).
                        Cannot move to target thread (0x563183178770)
                        

                        All other plug-ins are loaded from /usr/lib/qt/plugins, not /home/lizhe/.local/lib/python3.10/site-packages/cv2/qt/plugins
                        Do you have /home/lizhe/.local/lib/python3.10 in your PATH?

                        L Offline
                        L Offline
                        LiZheCN
                        wrote on 31 Jan 2022, 11:22 last edited by LiZheCN
                        #25

                        @jsulm said in [SOLVED] qt.qpa.plugin: Could not find the Qt platform plugin "xcb" in "":

                        /home/lizhe/.local/lib/python3.10/site-packages/cv2/qt/plugins

                        Yes I have this dir

                        The libxcb.so file I put it here, in case you need it

                        https://github.com/woshichuanqilz/others/blob/master/libqxcb.so

                        3d5cf45b-0ddb-4f86-abd0-7b6c8a0a0e76-image.png

                        jsulmJ 1 Reply Last reply 31 Jan 2022, 12:23
                        0
                        • L LiZheCN
                          31 Jan 2022, 11:22

                          @jsulm said in [SOLVED] qt.qpa.plugin: Could not find the Qt platform plugin "xcb" in "":

                          /home/lizhe/.local/lib/python3.10/site-packages/cv2/qt/plugins

                          Yes I have this dir

                          The libxcb.so file I put it here, in case you need it

                          https://github.com/woshichuanqilz/others/blob/master/libqxcb.so

                          3d5cf45b-0ddb-4f86-abd0-7b6c8a0a0e76-image.png

                          jsulmJ Offline
                          jsulmJ Offline
                          jsulm
                          Lifetime Qt Champion
                          wrote on 31 Jan 2022, 12:23 last edited by
                          #26

                          @LiZheCN said in [SOLVED] qt.qpa.plugin: Could not find the Qt platform plugin "xcb" in "":

                          in case you need it

                          I don't need it.
                          The thing is that kate should not load this plug-in from that location but from /usr/lib/qt/plugins!
                          Try to rename libxcb.so in /home/lizhe/.local/lib/python3.10/site-packages/cv2/qt/plugins to see whether this solves your issue.
                          And you did not answer my question.

                          https://forum.qt.io/topic/113070/qt-code-of-conduct

                          L 1 Reply Last reply 31 Jan 2022, 13:41
                          0
                          • jsulmJ jsulm
                            31 Jan 2022, 12:23

                            @LiZheCN said in [SOLVED] qt.qpa.plugin: Could not find the Qt platform plugin "xcb" in "":

                            in case you need it

                            I don't need it.
                            The thing is that kate should not load this plug-in from that location but from /usr/lib/qt/plugins!
                            Try to rename libxcb.so in /home/lizhe/.local/lib/python3.10/site-packages/cv2/qt/plugins to see whether this solves your issue.
                            And you did not answer my question.

                            L Offline
                            L Offline
                            LiZheCN
                            wrote on 31 Jan 2022, 13:41 last edited by LiZheCN
                            #27

                            @jsulm

                            What is your question ?

                            you mean this? :
                            Do you have /home/lizhe/.local/lib/python3.10 in your PATH?

                            I answered here.

                            593a72b0-931b-4a80-a9dd-6af7ff5d44e5-image.png

                            Hope I havent missed something

                            I will change the name of the so file. When this issue come out again. When I get the result I will give a reply. Thank you a lot for your help, really. I already to reinstall the system already. : P

                            jsulmJ 1 Reply Last reply 31 Jan 2022, 13:47
                            0
                            • L LiZheCN
                              31 Jan 2022, 13:41

                              @jsulm

                              What is your question ?

                              you mean this? :
                              Do you have /home/lizhe/.local/lib/python3.10 in your PATH?

                              I answered here.

                              593a72b0-931b-4a80-a9dd-6af7ff5d44e5-image.png

                              Hope I havent missed something

                              I will change the name of the so file. When this issue come out again. When I get the result I will give a reply. Thank you a lot for your help, really. I already to reinstall the system already. : P

                              jsulmJ Offline
                              jsulmJ Offline
                              jsulm
                              Lifetime Qt Champion
                              wrote on 31 Jan 2022, 13:47 last edited by
                              #28

                              @LiZheCN said in [SOLVED] qt.qpa.plugin: Could not find the Qt platform plugin "xcb" in "":

                              you mean this?

                              Yes, but the question is not whether that folder exists (it does of course), but whether this path is set in your PATH environment variable (or any other environment variable).

                              echo $PATH
                              

                              https://forum.qt.io/topic/113070/qt-code-of-conduct

                              L 1 Reply Last reply 31 Jan 2022, 13:59
                              0
                              • jsulmJ jsulm
                                31 Jan 2022, 13:47

                                @LiZheCN said in [SOLVED] qt.qpa.plugin: Could not find the Qt platform plugin "xcb" in "":

                                you mean this?

                                Yes, but the question is not whether that folder exists (it does of course), but whether this path is set in your PATH environment variable (or any other environment variable).

                                echo $PATH
                                
                                L Offline
                                L Offline
                                LiZheCN
                                wrote on 31 Jan 2022, 13:59 last edited by LiZheCN
                                #29

                                @jsulm

                                I change the name of libxcb.so to libxcb.so1 it still loaded. and get the same error.
                                I remove the libxcb.so file in /home/lizhe/.local/lib/python3.10/site-packages/cv2/qt/plugins. Everything seems works fine now.
                                Thank you.

                                Here is the output:
                                echo $PATH

                                /home/lizhe/Applications/Clash /home/lizhe/Applications/Clion/bin /home/lizhe/OriNote/linuxConfig/CommonScripts /home/lizhe/Applications /home/lizhe/.local/bin/ /home/lizhe/OriNote/wikiScripts /home/lizhe/.yarn/bin/ /home/lizhe/Applications/VSCode/ /home/lizhe/Applications/clion-2021.3.2/bin /home/lizhe/Applications/pycharm-2021.3.1/bin/ /home/lizhe/OriNote/wikiScripts/Utils /home/lizhe/OriNote/wikiScripts /home/lizhe/Applications/Clash /home/lizhe/Applications/Clion/bin /home/lizhe/OriNote/linuxConfig/CommonScripts /home/lizhe/Applications /home/lizhe/.local/bin/ /home/lizhe/OriNote/wikiScripts /home/lizhe/.yarn/bin/ /home/lizhe/Applications/VSCode/ /home/lizhe/Applications/clion-2021.3.2/bin /home/lizhe/Applications/pycharm-2021.3.1/bin/ /home/lizhe/OriNote/wikiScripts/Utils /home/lizhe/OriNote/wikiScripts /usr/local/sbin /usr/local/bin /usr/bin /usr/bin/site_perl /usr/bin/vendor_perl /usr/bin/core_perl /var/lib/snapd/snap/bin
                                
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