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qt fails to visualise application that is run on ubuntu 20.04 from macos

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  • SGaistS Offline
    SGaistS Offline
    SGaist
    Lifetime Qt Champion
    wrote on last edited by
    #2

    Hi and welcome to devnet,

    Set the QT_DEBUG_PLUGINS environment variable to 1 and start your application again without DISPLAY set. This will show you information about what is happening with the plugin.

    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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    • Y Offline
      Y Offline
      yasabanabe
      wrote on last edited by
      #3

      here is the output:
      QFactoryLoader::QFactoryLoader() checking directory path "/opt/gitAhead/GitAhead/Plugins/platforms" ...
      QFactoryLoader::QFactoryLoader() looking at "/opt/gitAhead/GitAhead/Plugins/platforms/libqxcb.so"
      Found metadata in lib /opt/gitAhead/GitAhead/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 "/opt/gitAhead/GitAhead/platforms" ...
      loaded library "/opt/gitAhead/GitAhead/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: xcb.

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      • SGaistS Offline
        SGaistS Offline
        SGaist
        Lifetime Qt Champion
        wrote on last edited by
        #4

        Do you have an X server running ?
        Are you on Wayland ?

        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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        • Y Offline
          Y Offline
          yasabanabe
          wrote on last edited by yasabanabe
          #5

          @SGaist said in qt fails to visualise application that is run on ubuntu 20.04 from macos:

          Wayland

          I am using tty
          I have no problems with ssh X for ubuntu to ubuntu

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          • SGaistS Offline
            SGaistS Offline
            SGaist
            Lifetime Qt Champion
            wrote on last edited by
            #6

            Sorry, I missed the macOS part.

            Did you install Xquartz on your Mac ?

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

            Y 1 Reply Last reply
            2
            • JoeCFDJ Offline
              JoeCFDJ Offline
              JoeCFD
              wrote on last edited by
              #7
              This post is deleted!
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              • SGaistS SGaist

                Sorry, I missed the macOS part.

                Did you install Xquartz on your Mac ?

                Y Offline
                Y Offline
                yasabanabe
                wrote on last edited by
                #8

                @SGaist
                when I run it with XQuartz I get:
                error: No matching fbConfigs or visuals found
                libGL error: failed to load driver: swrast

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                • SGaistS Offline
                  SGaistS Offline
                  SGaist
                  Lifetime Qt Champion
                  wrote on last edited by
                  #9

                  Did you restart your machine after installing Xquartz ?

                  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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                  • Y Offline
                    Y Offline
                    yasabanabe
                    wrote on last edited by
                    #10

                    I fixed it, there were some issued with the Debian packages and now it works fine. I have to install them again

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                    • SGaistS Offline
                      SGaistS Offline
                      SGaist
                      Lifetime Qt Champion
                      wrote on last edited by
                      #11

                      Which one did you need to reinstall ?

                      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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