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could not find qtplatfom plugin eglfs

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  • A Asha

    @jsulm

    while giving the /home/debian

    here is the compile output:
    11:13:06: Running steps for project concentriccircles...
    11:13:06: Configuration unchanged, skipping qmake step.
    11:13:06: Starting: "/usr/bin/make" -j4
    make: Nothing to be done for 'first'.
    11:13:06: The process "/usr/bin/make" exited normally.
    11:13:06: The remote file system has 46 megabytes of free space, going ahead.
    11:13:06: Deploy step finished.
    11:13:06: Trying to kill "/home/debian/Qt5/concentriccircles" on remote device...
    11:13:08: Remote application killed.
    11:13:08: Deploy step finished.
    11:13:08: sending incremental file list

    11:13:08:
    sent 72 bytes received 12 bytes 168.00 bytes/sec
    total size is 1,576,416 speedup is 18,766.86

    11:13:08: Deploy step finished.
    11:13:08: Elapsed time: 00:03.

    And

    Application output is:

    11:13:09: Starting /home/debian/Qt5/concentriccircles ...
    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.

    11:13:09: Remote process crashed.

    jsulmJ Offline
    jsulmJ Offline
    jsulm
    Lifetime Qt Champion
    wrote on last edited by
    #25

    @Asha said in could not find qtplatfom plugin eglfs:

    linuxfb, minimal, offscreen, vnc

    Looks like you did not build eglfs support when building Qt

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

    A 1 Reply Last reply
    0
    • jsulmJ jsulm

      @Asha said in could not find qtplatfom plugin eglfs:

      linuxfb, minimal, offscreen, vnc

      Looks like you did not build eglfs support when building Qt

      A Offline
      A Offline
      Asha
      wrote on last edited by
      #26

      @jsulm
      but other platforms like linuxfb and vnc both are enabled while building qt,

      And I exported linuxfb in my device...

      one more ,while building I tried with -eglfs option also but got the error like

      ERROR: 'eglfs' already enabled...

      jsulmJ 1 Reply Last reply
      0
      • A Asha

        @jsulm
        but other platforms like linuxfb and vnc both are enabled while building qt,

        And I exported linuxfb in my device...

        one more ,while building I tried with -eglfs option also but got the error like

        ERROR: 'eglfs' already enabled...

        jsulmJ Offline
        jsulmJ Offline
        jsulm
        Lifetime Qt Champion
        wrote on last edited by
        #27

        @Asha What do you actually want to use? eglfs? linuxfb? ...?
        Adding -eglfs is not going to help as it is already activated, but your Qt build does not support it.

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

        A 1 Reply Last reply
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        • jsulmJ jsulm

          @Asha What do you actually want to use? eglfs? linuxfb? ...?
          Adding -eglfs is not going to help as it is already activated, but your Qt build does not support it.

          A Offline
          A Offline
          Asha
          wrote on last edited by
          #28

          @jsulm I just want to run one simple application in my device, by using anyone..

          jsulmJ 1 Reply Last reply
          0
          • A Asha

            @jsulm I just want to run one simple application in my device, by using anyone..

            jsulmJ Offline
            jsulmJ Offline
            jsulm
            Lifetime Qt Champion
            wrote on last edited by
            #29

            @Asha Well, I think I already mentioned this once: you have to know what your device actually uses. Is it X11, eglfs, linuxfb, ...?

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

            A 1 Reply Last reply
            0
            • jsulmJ jsulm

              @Asha Well, I think I already mentioned this once: you have to know what your device actually uses. Is it X11, eglfs, linuxfb, ...?

              A Offline
              A Offline
              Asha
              wrote on last edited by
              #30

              @jsulm

              can you please tell me more about X11,or any link..what exactly it will do?

              jsulmJ 1 Reply Last reply
              0
              • A Asha

                @jsulm

                can you please tell me more about X11,or any link..what exactly it will do?

                jsulmJ Offline
                jsulmJ Offline
                jsulm
                Lifetime Qt Champion
                wrote on last edited by
                #31

                @Asha Google knows https://en.wikipedia.org/wiki/X_Window_System

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

                A 1 Reply Last reply
                0
                • jsulmJ jsulm

                  @Asha Google knows https://en.wikipedia.org/wiki/X_Window_System

                  A Offline
                  A Offline
                  Asha
                  wrote on last edited by
                  #32

                  @jsulm It means first i need to find which backend is running on my device ,based on that I need to cross compile the qt?

                  jsulmJ 1 Reply Last reply
                  0
                  • A Asha

                    @jsulm It means first i need to find which backend is running on my device ,based on that I need to cross compile the qt?

                    jsulmJ Offline
                    jsulmJ Offline
                    jsulm
                    Lifetime Qt Champion
                    wrote on last edited by
                    #33

                    @Asha said in could not find qtplatfom plugin eglfs:

                    i need to find which backend is running on my device

                    yes

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

                    A 1 Reply Last reply
                    0
                    • jsulmJ jsulm

                      @Asha said in could not find qtplatfom plugin eglfs:

                      i need to find which backend is running on my device

                      yes

                      A Offline
                      A Offline
                      Asha
                      wrote on last edited by
                      #34

                      @jsulm after finding ,again i need to build ,cross compiled qt?

                      jsulmJ 1 Reply Last reply
                      0
                      • A Asha

                        @jsulm after finding ,again i need to build ,cross compiled qt?

                        jsulmJ Offline
                        jsulmJ Offline
                        jsulm
                        Lifetime Qt Champion
                        wrote on last edited by
                        #35

                        @Asha If you did not cross compile needed platform plug-in then yes

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

                        A 1 Reply Last reply
                        0
                        • jsulmJ jsulm

                          @Asha If you did not cross compile needed platform plug-in then yes

                          A Offline
                          A Offline
                          Asha
                          wrote on last edited by
                          #36

                          @jsulm Hi,

                          I flashed my board with debian image...any idea which plugin is running on that image...

                          I got the answer ,we are using linux backend...

                          1 Reply Last reply
                          0
                          • A Offline
                            A Offline
                            Asha
                            wrote on last edited by
                            #37

                            for eglfs plugin ,which packages are required and how to install those?

                            jsulmJ 1 Reply Last reply
                            0
                            • A Asha

                              for eglfs plugin ,which packages are required and how to install those?

                              jsulmJ Offline
                              jsulmJ Offline
                              jsulm
                              Lifetime Qt Champion
                              wrote on last edited by
                              #38

                              @Asha Please take a look at https://doc.qt.io/qt-5/embedded-linux.html
                              "we are using linux backend" - which one?

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

                              A 1 Reply Last reply
                              0
                              • jsulmJ jsulm

                                @Asha Please take a look at https://doc.qt.io/qt-5/embedded-linux.html
                                "we are using linux backend" - which one?

                                A Offline
                                A Offline
                                Asha
                                wrote on last edited by
                                #39

                                @jsulm I asked,which backend is running on board?

                                got the ans:linux

                                shall I ask more about backend or any link?

                                jsulmJ 1 Reply Last reply
                                0
                                • A Asha

                                  @jsulm I asked,which backend is running on board?

                                  got the ans:linux

                                  shall I ask more about backend or any link?

                                  jsulmJ Offline
                                  jsulmJ Offline
                                  jsulm
                                  Lifetime Qt Champion
                                  wrote on last edited by
                                  #40

                                  @Asha We know from the beginning that the OS is Linux. Linux is an operating system supporting different technologies for graphics, like: X11, directfb, eglfs, ...
                                  These technologies is what is called "backends" in Qt.

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

                                  A 1 Reply Last reply
                                  0
                                  • jsulmJ jsulm

                                    @Asha We know from the beginning that the OS is Linux. Linux is an operating system supporting different technologies for graphics, like: X11, directfb, eglfs, ...
                                    These technologies is what is called "backends" in Qt.

                                    A Offline
                                    A Offline
                                    Asha
                                    wrote on last edited by
                                    #41

                                    @jsulm Hi ,Thank you for you guide...

                                    I found which plugin is running on my board,
                                    That is eglfs only,

                                    with this link https://doc.qt.io/qt-5/embedded-linux.html

                                    for beagleboneboard my build directory is Qt5,

                                    I got the information in the folder below

                                    cd /home/beagle/Qt5/mkspecs/devices/linux-beagleboard-g++/qmake.conf

                                    in qmake.conf file

                                    QT_QPA_DEFAULT_PLATFORM = eglfs

                                    so now,how to proceed next?

                                    can i change the QT_QPA_DEFAULT_PLATFORM in that file ?

                                    or need to configure with eglfs only?

                                    jsulmJ 1 Reply Last reply
                                    0
                                    • A Asha

                                      @jsulm Hi ,Thank you for you guide...

                                      I found which plugin is running on my board,
                                      That is eglfs only,

                                      with this link https://doc.qt.io/qt-5/embedded-linux.html

                                      for beagleboneboard my build directory is Qt5,

                                      I got the information in the folder below

                                      cd /home/beagle/Qt5/mkspecs/devices/linux-beagleboard-g++/qmake.conf

                                      in qmake.conf file

                                      QT_QPA_DEFAULT_PLATFORM = eglfs

                                      so now,how to proceed next?

                                      can i change the QT_QPA_DEFAULT_PLATFORM in that file ?

                                      or need to configure with eglfs only?

                                      jsulmJ Offline
                                      jsulmJ Offline
                                      jsulm
                                      Lifetime Qt Champion
                                      wrote on last edited by
                                      #42

                                      @Asha What did configure say about eglfs? Was it activated?

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

                                      A 1 Reply Last reply
                                      0
                                      • jsulmJ jsulm

                                        @Asha What did configure say about eglfs? Was it activated?

                                        A Offline
                                        A Offline
                                        Asha
                                        wrote on last edited by
                                        #43

                                        @jsulm I gone through this link,https://doc.qt.io/qt-5.12/embedded-linux.html

                                        please go through the selected paragraph in the below screenshot,eglfs.png
                                        in the mentioned the path i got it(dont no its currect or not just guessed)

                                        jsulmJ 1 Reply Last reply
                                        0
                                        • A Offline
                                          A Offline
                                          Asha
                                          wrote on last edited by
                                          #44

                                          how to proceed next?

                                          1 Reply Last reply
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