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qt.qpa.xcb: could not connect to display :1.0 qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.

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  • B B_R_Khan

    @JonB It's giving me a different error now:

    Cannot mix incompatible Qt library (version 0x50c08) with this library (version 0x50c09)

    JonBJ Offline
    JonBJ Offline
    JonB
    wrote on last edited by
    #8

    @B_R_Khan said in qt.qpa.xcb: could not connect to display :1.0 qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.:

    @JonB It's giving me a different error now:

    Programs are (mostly) deterministic and do not give different error messages each time they run.

    Unless you changed something and don't bother to say what, in which case there's no point asking about it.

    Meanwhile, that is an error message about Qt. xterm does not use Qt. I said get xterm working then your Qt issue should resolve itself. Fiddling with things Qt won't affect xterm, or your problem.

    B 1 Reply Last reply
    0
    • JonBJ JonB

      @B_R_Khan said in qt.qpa.xcb: could not connect to display :1.0 qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.:

      @JonB It's giving me a different error now:

      Programs are (mostly) deterministic and do not give different error messages each time they run.

      Unless you changed something and don't bother to say what, in which case there's no point asking about it.

      Meanwhile, that is an error message about Qt. xterm does not use Qt. I said get xterm working then your Qt issue should resolve itself. Fiddling with things Qt won't affect xterm, or your problem.

      B Offline
      B Offline
      B_R_Khan
      wrote on last edited by B_R_Khan
      #9

      @JonB
      sorry for not being clear enough. I apologize.

      I was following the thread https://forum.qt.io/topic/111553/solved-qt-qpa-plugin-could-not-find-the-qt-platform-plugin-xcb-in/8 before I posted this question. Initially, I was only getting qt plugin not found error. I followed the steps
      export QT_PLUGIN_PATH=/usr/lib/x86_64-linux-gnu/qt5/plugins
      export QT_DEBUG_PLUGINS=1
      flameshot / gave plot command in gnuplot
      It started giving the error I asked in this thread i-e display not found and could not load qt plugin even though it was found.
      I started looking for display not found error as you mentioned it's not qt error. Assuming that I have to run the export QT_PLUGIN_PATH=/usr/lib/x86_64-linux-gnu/qt5/plugins everytime I open new terminal, I executed all of the above commands again in new terminal in addition to sudo ln -sf /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms. I ran flameshot again and got error:

      Got keys from plugin meta data ("ibus")
      QFactoryLoader::QFactoryLoader() checking directory path "/usr/bin/platforminputcontexts" ...
      loaded library "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforminputcontexts/libibusplatforminputcontextplugin.so"
      Cannot mix incompatible Qt library (version 0x50c08) with this library (version 0x50c09)
      Aborted (core dumped)
      

      I deleted all xcb libraries and qt packages, reinstalled but again getting the same error. I don't know what went wrong.

      jsulmJ JonBJ 2 Replies Last reply
      0
      • B B_R_Khan

        @JonB
        sorry for not being clear enough. I apologize.

        I was following the thread https://forum.qt.io/topic/111553/solved-qt-qpa-plugin-could-not-find-the-qt-platform-plugin-xcb-in/8 before I posted this question. Initially, I was only getting qt plugin not found error. I followed the steps
        export QT_PLUGIN_PATH=/usr/lib/x86_64-linux-gnu/qt5/plugins
        export QT_DEBUG_PLUGINS=1
        flameshot / gave plot command in gnuplot
        It started giving the error I asked in this thread i-e display not found and could not load qt plugin even though it was found.
        I started looking for display not found error as you mentioned it's not qt error. Assuming that I have to run the export QT_PLUGIN_PATH=/usr/lib/x86_64-linux-gnu/qt5/plugins everytime I open new terminal, I executed all of the above commands again in new terminal in addition to sudo ln -sf /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms. I ran flameshot again and got error:

        Got keys from plugin meta data ("ibus")
        QFactoryLoader::QFactoryLoader() checking directory path "/usr/bin/platforminputcontexts" ...
        loaded library "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforminputcontexts/libibusplatforminputcontextplugin.so"
        Cannot mix incompatible Qt library (version 0x50c08) with this library (version 0x50c09)
        Aborted (core dumped)
        

        I deleted all xcb libraries and qt packages, reinstalled but again getting the same error. I don't know what went wrong.

        jsulmJ Offline
        jsulmJ Offline
        jsulm
        Lifetime Qt Champion
        wrote on last edited by
        #10

        @B_R_Khan said in qt.qpa.xcb: could not connect to display :1.0 qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.:

        Assuming that I have to run the export QT_PLUGIN_PATH=/usr/lib/x86_64-linux-gnu/qt5/plugins

        This is wrong assumption.
        Your problem has NOTHING to do with Qt!
        The problem is that you do not have XServer running, or display: :1.0 is wrong.
        So, do NOT set QT_PLUGIN_PATH.
        Make sure you have XServer running and find out which display id you have to use.

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

        1 Reply Last reply
        1
        • B B_R_Khan

          @JonB
          sorry for not being clear enough. I apologize.

          I was following the thread https://forum.qt.io/topic/111553/solved-qt-qpa-plugin-could-not-find-the-qt-platform-plugin-xcb-in/8 before I posted this question. Initially, I was only getting qt plugin not found error. I followed the steps
          export QT_PLUGIN_PATH=/usr/lib/x86_64-linux-gnu/qt5/plugins
          export QT_DEBUG_PLUGINS=1
          flameshot / gave plot command in gnuplot
          It started giving the error I asked in this thread i-e display not found and could not load qt plugin even though it was found.
          I started looking for display not found error as you mentioned it's not qt error. Assuming that I have to run the export QT_PLUGIN_PATH=/usr/lib/x86_64-linux-gnu/qt5/plugins everytime I open new terminal, I executed all of the above commands again in new terminal in addition to sudo ln -sf /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms. I ran flameshot again and got error:

          Got keys from plugin meta data ("ibus")
          QFactoryLoader::QFactoryLoader() checking directory path "/usr/bin/platforminputcontexts" ...
          loaded library "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforminputcontexts/libibusplatforminputcontextplugin.so"
          Cannot mix incompatible Qt library (version 0x50c08) with this library (version 0x50c09)
          Aborted (core dumped)
          

          I deleted all xcb libraries and qt packages, reinstalled but again getting the same error. I don't know what went wrong.

          JonBJ Offline
          JonBJ Offline
          JonB
          wrote on last edited by
          #11

          @B_R_Khan
          As I said clearly earlier, forget Qt anything. Come back as & when you have xterm starting correctly.

          1 Reply Last reply
          1
          • SGaistS Offline
            SGaistS Offline
            SGaist
            Lifetime Qt Champion
            wrote on last edited by
            #12

            Hi,

            Any chances that your desktop environment runs on top of Wayland ?

            What are you currently using ?

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

            B X 2 Replies Last reply
            1
            • SGaistS SGaist

              Hi,

              Any chances that your desktop environment runs on top of Wayland ?

              What are you currently using ?

              B Offline
              B Offline
              B_R_Khan
              wrote on last edited by
              #13

              @SGaist Hi!

              I have x11 and xterm is running now since I started using a different kernel version. Unfortunately, I'm still not being able to solve this error. The error says:

              qt.qpa.plugin: Could not find the Qt platform plugin "xcb" in ""
              This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
              
              Aborted (core dumped)
              

              The output for ldd libqxcb.so is:

              linux-vdso.so.1 (0x00007ffcd771e000)
              	libQt5XcbQpa.so.5 => /home/b/OpenFOAM/ParaView-5.9.1/lib/libQt5XcbQpa.so.5 (0x00007f324df9f000)
              	libQt5Gui.so.5 => /home/b/OpenFOAM/ParaView-5.9.1/lib/libQt5Gui.so.5 (0x00007f324d786000)
              	libQt5Core.so.5 => /home/b/OpenFOAM/ParaView-5.9.1/lib/libQt5Core.so.5 (0x00007f324cf66000)
              	libstdc++.so.6 => /lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f324cd67000)
              	libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f324cb73000)
              	libGL.so.1 => /lib/x86_64-linux-gnu/libGL.so.1 (0x00007f324caeb000)
              	libfontconfig.so.1 => /home/b/OpenFOAM/ParaView-5.9.1/lib/libfontconfig.so.1 (0x00007f324c89c000)
              	libfreetype.so.6 => /home/b/OpenFOAM/ParaView-5.9.1/lib/libfreetype.so.6 (0x00007f324c5b1000)
              	libz.so.1 => /home/b/OpenFOAM/ParaView-5.9.1/lib/libz.so.1 (0x00007f324c394000)
              	libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f324c371000)
              	libX11-xcb.so.1 => /lib/x86_64-linux-gnu/libX11-xcb.so.1 (0x00007f324c36a000)
              	libxcb.so.1 => /lib/x86_64-linux-gnu/libxcb.so.1 (0x00007f324c340000)
              	libXrender.so.1 => /lib/x86_64-linux-gnu/libXrender.so.1 (0x00007f324c136000)
              	libXext.so.6 => /lib/x86_64-linux-gnu/libXext.so.6 (0x00007f324c121000)
              	libX11.so.6 => /lib/x86_64-linux-gnu/libX11.so.6 (0x00007f324bfe4000)
              	libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f324be95000)
              	libSM.so.6 => /lib/x86_64-linux-gnu/libSM.so.6 (0x00007f324be88000)
              	libICE.so.6 => /lib/x86_64-linux-gnu/libICE.so.6 (0x00007f324be6a000)
              	libxkbcommon-x11.so.0 => /lib/x86_64-linux-gnu/libxkbcommon-x11.so.0 (0x00007f324be5f000)
              	libxkbcommon.so.0 => /lib/x86_64-linux-gnu/libxkbcommon.so.0 (0x00007f324be1d000)
              	libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f324be17000)
              	libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f324bdfc000)
              	libpng16.so.16 => /home/b/OpenFOAM/ParaView-5.9.1/lib/libpng16.so.16 (0x00007f324bbb7000)
              	/lib64/ld-linux-x86-64.so.2 (0x00007f324e2d9000)
              	libGLdispatch.so.0 => /lib/x86_64-linux-gnu/libGLdispatch.so.0 (0x00007f324baff000)
              	libGLX.so.0 => /lib/x86_64-linux-gnu/libGLX.so.0 (0x00007f324bacb000)
              	libxml2.so.2 => /home/b/OpenFOAM/ParaView-5.9.1/lib/../lib/libxml2.so.2 (0x00007f324b70f000)
              	libuuid.so.1 => /home/b/OpenFOAM/ParaView-5.9.1/lib/../lib/libuuid.so.1 (0x00007f324b507000)
              	libXau.so.6 => /lib/x86_64-linux-gnu/libXau.so.6 (0x00007f324b4ff000)
              	libXdmcp.so.6 => /lib/x86_64-linux-gnu/libXdmcp.so.6 (0x00007f324b4f7000)
              	libbsd.so.0 => /lib/x86_64-linux-gnu/libbsd.so.0 (0x00007f324b4dd000)
              	libxcb-xkb.so.1 => /lib/x86_64-linux-gnu/libxcb-xkb.so.1 (0x00007f324b4bf000)
              
              

              Would really appreciate some help since I want to use some applications that can't be run without qt

              Thanks

              JonBJ 1 Reply Last reply
              0
              • B B_R_Khan

                @SGaist Hi!

                I have x11 and xterm is running now since I started using a different kernel version. Unfortunately, I'm still not being able to solve this error. The error says:

                qt.qpa.plugin: Could not find the Qt platform plugin "xcb" in ""
                This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
                
                Aborted (core dumped)
                

                The output for ldd libqxcb.so is:

                linux-vdso.so.1 (0x00007ffcd771e000)
                	libQt5XcbQpa.so.5 => /home/b/OpenFOAM/ParaView-5.9.1/lib/libQt5XcbQpa.so.5 (0x00007f324df9f000)
                	libQt5Gui.so.5 => /home/b/OpenFOAM/ParaView-5.9.1/lib/libQt5Gui.so.5 (0x00007f324d786000)
                	libQt5Core.so.5 => /home/b/OpenFOAM/ParaView-5.9.1/lib/libQt5Core.so.5 (0x00007f324cf66000)
                	libstdc++.so.6 => /lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f324cd67000)
                	libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f324cb73000)
                	libGL.so.1 => /lib/x86_64-linux-gnu/libGL.so.1 (0x00007f324caeb000)
                	libfontconfig.so.1 => /home/b/OpenFOAM/ParaView-5.9.1/lib/libfontconfig.so.1 (0x00007f324c89c000)
                	libfreetype.so.6 => /home/b/OpenFOAM/ParaView-5.9.1/lib/libfreetype.so.6 (0x00007f324c5b1000)
                	libz.so.1 => /home/b/OpenFOAM/ParaView-5.9.1/lib/libz.so.1 (0x00007f324c394000)
                	libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f324c371000)
                	libX11-xcb.so.1 => /lib/x86_64-linux-gnu/libX11-xcb.so.1 (0x00007f324c36a000)
                	libxcb.so.1 => /lib/x86_64-linux-gnu/libxcb.so.1 (0x00007f324c340000)
                	libXrender.so.1 => /lib/x86_64-linux-gnu/libXrender.so.1 (0x00007f324c136000)
                	libXext.so.6 => /lib/x86_64-linux-gnu/libXext.so.6 (0x00007f324c121000)
                	libX11.so.6 => /lib/x86_64-linux-gnu/libX11.so.6 (0x00007f324bfe4000)
                	libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f324be95000)
                	libSM.so.6 => /lib/x86_64-linux-gnu/libSM.so.6 (0x00007f324be88000)
                	libICE.so.6 => /lib/x86_64-linux-gnu/libICE.so.6 (0x00007f324be6a000)
                	libxkbcommon-x11.so.0 => /lib/x86_64-linux-gnu/libxkbcommon-x11.so.0 (0x00007f324be5f000)
                	libxkbcommon.so.0 => /lib/x86_64-linux-gnu/libxkbcommon.so.0 (0x00007f324be1d000)
                	libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f324be17000)
                	libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f324bdfc000)
                	libpng16.so.16 => /home/b/OpenFOAM/ParaView-5.9.1/lib/libpng16.so.16 (0x00007f324bbb7000)
                	/lib64/ld-linux-x86-64.so.2 (0x00007f324e2d9000)
                	libGLdispatch.so.0 => /lib/x86_64-linux-gnu/libGLdispatch.so.0 (0x00007f324baff000)
                	libGLX.so.0 => /lib/x86_64-linux-gnu/libGLX.so.0 (0x00007f324bacb000)
                	libxml2.so.2 => /home/b/OpenFOAM/ParaView-5.9.1/lib/../lib/libxml2.so.2 (0x00007f324b70f000)
                	libuuid.so.1 => /home/b/OpenFOAM/ParaView-5.9.1/lib/../lib/libuuid.so.1 (0x00007f324b507000)
                	libXau.so.6 => /lib/x86_64-linux-gnu/libXau.so.6 (0x00007f324b4ff000)
                	libXdmcp.so.6 => /lib/x86_64-linux-gnu/libXdmcp.so.6 (0x00007f324b4f7000)
                	libbsd.so.0 => /lib/x86_64-linux-gnu/libbsd.so.0 (0x00007f324b4dd000)
                	libxcb-xkb.so.1 => /lib/x86_64-linux-gnu/libxcb-xkb.so.1 (0x00007f324b4bf000)
                
                

                Would really appreciate some help since I want to use some applications that can't be run without qt

                Thanks

                JonBJ Offline
                JonBJ Offline
                JonB
                wrote on last edited by JonB
                #14

                @B_R_Khan
                Please post (or look at) the output after export QT_DEBUG_PLUGINS=1, at the end where it will state what the actual issue is. You should have more lines preceding the 2 lines you post above.

                B 1 Reply Last reply
                0
                • JonBJ JonB

                  @B_R_Khan
                  Please post (or look at) the output after export QT_DEBUG_PLUGINS=1, at the end where it will state what the actual issue is. You should have more lines preceding the 2 lines you post above.

                  B Offline
                  B Offline
                  B_R_Khan
                  wrote on last edited by
                  #15

                  @JonB

                  I get this when I run gnuplot commands after export QT_DEBUG_PLUGINS=1:

                  QFactoryLoader::QFactoryLoader() checking directory path "/usr/bin/platforms" ...
                  qt.qpa.plugin: Could not find the Qt platform plugin "xcb" in ""
                  This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
                  
                  Aborted (core dumped)
                  
                  JonBJ 1 Reply Last reply
                  0
                  • B B_R_Khan

                    @JonB

                    I get this when I run gnuplot commands after export QT_DEBUG_PLUGINS=1:

                    QFactoryLoader::QFactoryLoader() checking directory path "/usr/bin/platforms" ...
                    qt.qpa.plugin: Could not find the Qt platform plugin "xcb" in ""
                    This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
                    
                    Aborted (core dumped)
                    
                    JonBJ Offline
                    JonBJ Offline
                    JonB
                    wrote on last edited by
                    #16

                    @B_R_Khan
                    I am really surprised. If you look at anyone else reporting this or similar issues you will see they get voluminous diagnostic output. Are you setting the environment variable in a shell/terminal and running your application from there after setting the variable? If the output is not markedly different with and without that variable set it does not sound right.

                    B 1 Reply Last reply
                    0
                    • JonBJ JonB

                      @B_R_Khan
                      I am really surprised. If you look at anyone else reporting this or similar issues you will see they get voluminous diagnostic output. Are you setting the environment variable in a shell/terminal and running your application from there after setting the variable? If the output is not markedly different with and without that variable set it does not sound right.

                      B Offline
                      B Offline
                      B_R_Khan
                      wrote on last edited by B_R_Khan
                      #17

                      @JonB

                      I ran export QT_DEBUG_PLUGINS=1 in a new terminal and then ran flameshot/ gnuplot commands . Flameshot gives:

                      QFactoryLoader::QFactoryLoader() checking directory path "/usr/bin/platforms" ...
                      qt.qpa.plugin: Could not find the Qt platform plugin "xcb" in ""
                      This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
                      
                      Aborted (core dumped)
                      

                      Gnuplot gives following when I try to plot anything:

                      Terminal type is now 'qt'
                      gnuplot> plot sin(x)/x  
                      QFactoryLoader::QFactoryLoader() checking directory path "/usr/lib/gnuplot/platforms" ...
                      qt.qpa.plugin: Could not find the Qt platform plugin "xcb" in ""
                      This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
                      
                      Could not connect to existing gnuplot_qt. Starting a new one.
                      QFactoryLoader::QFactoryLoader() checking directory path "/usr/lib/gnuplot/platforms" ...
                      qt.qpa.plugin: Could not find the Qt platform plugin "xcb" in ""
                      This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
                      

                      I hope I followed your instructions correctly . I am using paraview as well which requires qt and it is running fine.
                      I also want to mention that I get the following when I try the command qmake --version:
                      QMake version 3.1
                      Using Qt version 5.12.8 in /usr/lib/x86_64-linux-gnu

                      1 Reply Last reply
                      0
                      • SGaistS Offline
                        SGaistS Offline
                        SGaist
                        Lifetime Qt Champion
                        wrote on last edited by
                        #18

                        What output do you get from paraview if you set QT_DEBUG_PLUGINS to 1 ?

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

                        B 1 Reply Last reply
                        2
                        • SGaistS SGaist

                          What output do you get from paraview if you set QT_DEBUG_PLUGINS to 1 ?

                          B Offline
                          B Offline
                          B_R_Khan
                          wrote on last edited by
                          #19

                          @SGaist
                          I get the following output:

                          QFactoryLoader::QFactoryLoader() checking directory path "/home/b/OpenFOAM/ParaView-5.9.1/plugins/platforms" ...
                          QFactoryLoader::QFactoryLoader() looking at "/home/b/OpenFOAM/ParaView-5.9.1/plugins/platforms/libqxcb.so"
                          Found metadata in lib /home/b/OpenFOAM/ParaView-5.9.1/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/b/OpenFOAM/ParaView-5.9.1/bin/platforms" ...
                          loaded library "/home/b/OpenFOAM/ParaView-5.9.1/plugins/platforms/libqxcb.so"
                          loaded library "Xcursor"
                          QFactoryLoader::QFactoryLoader() checking directory path "/home/b/OpenFOAM/ParaView-5.9.1/plugins/platformthemes" ...
                          QFactoryLoader::QFactoryLoader() checking directory path "/home/b/OpenFOAM/ParaView-5.9.1/bin/platformthemes" ...
                          QFactoryLoader::QFactoryLoader() checking directory path "/home/b/OpenFOAM/ParaView-5.9.1/plugins/platforminputcontexts" ...
                          QFactoryLoader::QFactoryLoader() looking at "/home/b/OpenFOAM/ParaView-5.9.1/plugins/platforminputcontexts/libcomposeplatforminputcontextplugin.so"
                          Found metadata in lib /home/b/OpenFOAM/ParaView-5.9.1/plugins/platforminputcontexts/libcomposeplatforminputcontextplugin.so, metadata=
                          {
                              "IID": "org.qt-project.Qt.QPlatformInputContextFactoryInterface.5.1",
                              "MetaData": {
                                  "Keys": [
                                      "compose",
                                      "xim"
                                  ]
                              },
                              "archreq": 0,
                              "className": "QComposePlatformInputContextPlugin",
                              "debug": false,
                              "version": 330752
                          }
                          
                          
                          Got keys from plugin meta data ("compose", "xim")
                          QFactoryLoader::QFactoryLoader() checking directory path "/home/b/OpenFOAM/ParaView-5.9.1/bin/platforminputcontexts" ...
                          loaded library "/home/b/OpenFOAM/ParaView-5.9.1/plugins/platforminputcontexts/libcomposeplatforminputcontextplugin.so"
                          QFactoryLoader::QFactoryLoader() checking directory path "/home/b/OpenFOAM/ParaView-5.9.1/plugins/styles" ...
                          QFactoryLoader::QFactoryLoader() checking directory path "/home/b/OpenFOAM/ParaView-5.9.1/bin/styles" ...
                          QFactoryLoader::QFactoryLoader() checking directory path "/home/b/OpenFOAM/ParaView-5.9.1/plugins/iconengines" ...
                          QFactoryLoader::QFactoryLoader() looking at "/home/b/OpenFOAM/ParaView-5.9.1/plugins/iconengines/libqsvgicon.so"
                          Found metadata in lib /home/b/OpenFOAM/ParaView-5.9.1/plugins/iconengines/libqsvgicon.so, metadata=
                          {
                              "IID": "org.qt-project.Qt.QIconEngineFactoryInterface",
                              "MetaData": {
                                  "Keys": [
                                      "svg",
                                      "svgz",
                                      "svg.gz"
                                  ]
                              },
                              "archreq": 0,
                              "className": "QSvgIconPlugin",
                              "debug": false,
                              "version": 330752
                          }
                          
                          
                          Got keys from plugin meta data ("svg", "svgz", "svg.gz")
                          QFactoryLoader::QFactoryLoader() checking directory path "/home/b/OpenFOAM/ParaView-5.9.1/bin/iconengines" ...
                          QFactoryLoader::QFactoryLoader() checking directory path "/home/b/OpenFOAM/ParaView-5.9.1/plugins/imageformats" ...
                          QFactoryLoader::QFactoryLoader() looking at "/home/b/OpenFOAM/ParaView-5.9.1/plugins/imageformats/libqsvg.so"
                          Found metadata in lib /home/b/OpenFOAM/ParaView-5.9.1/plugins/imageformats/libqsvg.so, metadata=
                          {
                              "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
                              "MetaData": {
                                  "Keys": [
                                      "svg",
                                      "svgz"
                                  ],
                                  "MimeTypes": [
                                      "image/svg+xml",
                                      "image/svg+xml-compressed"
                                  ]
                              },
                              "archreq": 0,
                              "className": "QSvgPlugin",
                              "debug": false,
                              "version": 330752
                          }
                          
                          
                          Got keys from plugin meta data ("svg", "svgz")
                          QFactoryLoader::QFactoryLoader() checking directory path "/home/b/OpenFOAM/ParaView-5.9.1/bin/imageformats" ...
                          loaded library "/home/b/OpenFOAM/ParaView-5.9.1/plugins/imageformats/libqsvg.so"
                          loaded library "/home/b/OpenFOAM/ParaView-5.9.1/plugins/iconengines/libqsvgicon.so"
                          QFactoryLoader::QFactoryLoader() checking directory path "/home/b/OpenFOAM/ParaView-5.9.1/plugins/accessible" ...
                          QFactoryLoader::QFactoryLoader() checking directory path "/home/b/OpenFOAM/ParaView-5.9.1/bin/accessible" ...
                          VisRTX 0.1.6, using devices:
                           0: NVIDIA GeForce RTX 3050 Ti Laptop GPU (Total: 4.1 GB, Available: 4.0 GB)
                          debug: In unknown, line 0
                          debug: QFactoryLoader::QFactoryLoader() checking directory path "/home/b/OpenFOAM/ParaView-5.9.1/plugins/xcbglintegrations" ...
                          debug: In unknown, line 0
                          debug: QFactoryLoader::QFactoryLoader() looking at "/home/b/OpenFOAM/ParaView-5.9.1/plugins/xcbglintegrations/libqxcb-glx-integration.so"
                          
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                          0
                          • hskoglundH Offline
                            hskoglundH Offline
                            hskoglund
                            wrote on last edited by
                            #20

                            Hi, paraview works because is using it's own Qt (version 5.9.1).
                            On the same PC you also have Qt version 5.12.8 and 5.12.9 installed. Having more than one version of Qt installed on the same computer is always risky :.-(
                            Try to get rid of that qt5-default Qt version 5.12.8 and instead install complete versions of flameshot and gnuplot (so that they get also get their own, internal Qt version, like paraview has now).

                            1 Reply Last reply
                            1
                            • M Offline
                              M Offline
                              muhammad4997
                              wrote on last edited by
                              #21

                              I am using a remote Jupyter notebook and trying to start the qtconsole but getting the following error.

                              qt.qpa.xcb: could not connect to display :0
                              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: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, webgl, xcb.

                              I have tried both
                              export DISPLAY=:0
                              $
                              export DISPLAY=:1

                              1 Reply Last reply
                              0
                              • SGaistS Offline
                                SGaistS Offline
                                SGaist
                                Lifetime Qt Champion
                                wrote on last edited by
                                #22

                                When you say remote, how are you accessing it ?

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

                                M 1 Reply Last reply
                                0
                                • SGaistS SGaist

                                  When you say remote, how are you accessing it ?

                                  M Offline
                                  M Offline
                                  muhammad4997
                                  wrote on last edited by muhammad4997
                                  #23

                                  @SGaist I access it via IP and port like
                                  http://<IP>:8999

                                  The Jupyter is deployed on another server machine

                                  1 Reply Last reply
                                  0
                                  • SGaistS Offline
                                    SGaistS Offline
                                    SGaist
                                    Lifetime Qt Champion
                                    wrote on last edited by
                                    #24

                                    So you have a JupyterLab session running ?

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

                                    M 1 Reply Last reply
                                    0
                                    • SGaistS SGaist

                                      So you have a JupyterLab session running ?

                                      M Offline
                                      M Offline
                                      muhammad4997
                                      wrote on last edited by
                                      #25

                                      @SGaist No its not a JupyterLab session. It is only notebook running on a remote machine. On remote machine i installed it via
                                      "pip install notebook"

                                      1 Reply Last reply
                                      0
                                      • SGaistS Offline
                                        SGaistS Offline
                                        SGaist
                                        Lifetime Qt Champion
                                        wrote on last edited by
                                        #26

                                        What is your exact setup ?
                                        You seem to be running your notebook in a browser.

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

                                        1 Reply Last reply
                                        0
                                        • SGaistS SGaist

                                          Hi,

                                          Any chances that your desktop environment runs on top of Wayland ?

                                          What are you currently using ?

                                          X Offline
                                          X Offline
                                          Ximeng
                                          wrote on last edited by
                                          #27

                                          @SGaist Hello, I got the same problem as this post "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. And I am installing code_saturne v7.2.0 in WSL ubuntu 20.04.5. It seems like my laptop environment runs on Wayland, since when I use synaptic, it showed that: 'Probably you're running Synaptic on Wayland with root permission.
                                          Please restart your session without Wayland, or run Synaptic without root permission.'
                                          Do you have any suggestions about this? Very appreciate.

                                          SGaistS 1 Reply Last reply
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