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Qt Creator + Ubuntu 20.04

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  • mrjjM Offline
    mrjjM Offline
    mrjj
    Lifetime Qt Champion
    wrote on last edited by mrjj
    #2

    Hi
    Do @JonB suggestion first please :)

    Try
    sudo apt purge libxcb
    sudo apt install libxcb

    F 1 Reply Last reply
    2
    • F fem_dev

      I formated my PC and installed the Ubuntu 20.04 Desktop.

      After that I installed Qt 5.15 with Qt Creator IDE and the libgl-dev.
      When I tried to run a simple C++ Address Book Qt example, I got this error message below:

      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, xcb.
      
      16:24:29: The program has unexpectedly finished.
      

      How can I fix it?

      • Qt Creator IDE 4.12.3
      • Qt 5.15 (gcc)
      JonBJ Online
      JonBJ Online
      JonB
      wrote on last edited by
      #3

      @fem_dev
      In shell:

      export QT_DEBUG_PLUGINS=1
      

      Run your program, look through output for what it says it didn't find.

      F 1 Reply Last reply
      2
      • mrjjM mrjj

        Hi
        Do @JonB suggestion first please :)

        Try
        sudo apt purge libxcb
        sudo apt install libxcb

        F Offline
        F Offline
        fem_dev
        wrote on last edited by
        #4

        @mrjj

        When I trie dto purge and install...I got the same message:
        E: Unable to locate package libxcb

        mrjjM 1 Reply Last reply
        0
        • JonBJ JonB

          @fem_dev
          In shell:

          export QT_DEBUG_PLUGINS=1
          

          Run your program, look through output for what it says it didn't find.

          F Offline
          F Offline
          fem_dev
          wrote on last edited by
          #5

          @JonB said in Qt Creator + Ubuntu 20.04:

          export QT_DEBUG_PLUGINS=1

          I paste this line in my Ubuntu Terminal...but I got the same error message...

          mrjjM 1 Reply Last reply
          0
          • F fem_dev

            @mrjj

            When I trie dto purge and install...I got the same message:
            E: Unable to locate package libxcb

            mrjjM Offline
            mrjjM Offline
            mrjj
            Lifetime Qt Champion
            wrote on last edited by
            #6

            Hi
            and you did sudo apt-get update etc ?

            But try the QT_DEBUG_PLUGINS=1 and see if something is missing.

            F 1 Reply Last reply
            0
            • F fem_dev

              @JonB said in Qt Creator + Ubuntu 20.04:

              export QT_DEBUG_PLUGINS=1

              I paste this line in my Ubuntu Terminal...but I got the same error message...

              mrjjM Offline
              mrjjM Offline
              mrjj
              Lifetime Qt Champion
              wrote on last edited by
              #7

              @fem_dev said in Qt Creator + Ubuntu 20.04:

              @JonB said in Qt Creator + Ubuntu 20.04:

              export QT_DEBUG_PLUGINS=1

              I paste this line in my Ubuntu Terminal...but I got the same error message...

              well you have to start Creator from that shell too and then it should list tons of infor about stuff it loads or cant load.

              1 Reply Last reply
              0
              • mrjjM mrjj

                Hi
                and you did sudo apt-get update etc ?

                But try the QT_DEBUG_PLUGINS=1 and see if something is missing.

                F Offline
                F Offline
                fem_dev
                wrote on last edited by fem_dev
                #8

                @mrjj
                I did:

                sudo apt-get update (done!)
                sudo apt install libxcb

                And I got:

                E: Unable to locate package libxcb
                

                I opened the Ubuntu Terminal and wrote:

                export QT_DEBUG_PLUGINS=1
                

                So I tried to run the Address Book Qt Example: Same error...

                I Tried to open the QtCreator from the same Terminal...but I got the same error...

                JonBJ 1 Reply Last reply
                0
                • F fem_dev

                  @mrjj
                  I did:

                  sudo apt-get update (done!)
                  sudo apt install libxcb

                  And I got:

                  E: Unable to locate package libxcb
                  

                  I opened the Ubuntu Terminal and wrote:

                  export QT_DEBUG_PLUGINS=1
                  

                  So I tried to run the Address Book Qt Example: Same error...

                  I Tried to open the QtCreator from the same Terminal...but I got the same error...

                  JonBJ Online
                  JonBJ Online
                  JonB
                  wrote on last edited by
                  #9

                  @fem_dev
                  Where did you try to run the program from after typing into the shell?

                  F 1 Reply Last reply
                  0
                  • JonBJ JonB

                    @fem_dev
                    Where did you try to run the program from after typing into the shell?

                    F Offline
                    F Offline
                    fem_dev
                    wrote on last edited by
                    #10

                    @JonB Using QtCreator IDE...in the "run" green button...as always...

                    JonBJ 1 Reply Last reply
                    0
                    • F fem_dev

                      @JonB Using QtCreator IDE...in the "run" green button...as always...

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

                      @fem_dev
                      In which case, doing something in a shell won't help...

                      Can you please go into terminal/shell, type export QT_DEBUG_PLUGINS=1, and then run your program from there? As a developer you ought know about setting environment variables.

                      F 1 Reply Last reply
                      0
                      • JonBJ JonB

                        @fem_dev
                        In which case, doing something in a shell won't help...

                        Can you please go into terminal/shell, type export QT_DEBUG_PLUGINS=1, and then run your program from there? As a developer you ought know about setting environment variables.

                        F Offline
                        F Offline
                        fem_dev
                        wrote on last edited by
                        #12

                        @JonB Yes, I can try to do it.

                        But, I always used the Qt Creator green "run" button.

                        Is it possible yet on Ubuntu 20.04?
                        Or I will need to run and debug my Qt applications using Ubuntu Terminal now?

                        mrjjM JonBJ 2 Replies Last reply
                        0
                        • F fem_dev

                          @JonB Yes, I can try to do it.

                          But, I always used the Qt Creator green "run" button.

                          Is it possible yet on Ubuntu 20.04?
                          Or I will need to run and debug my Qt applications using Ubuntu Terminal now?

                          mrjjM Offline
                          mrjjM Offline
                          mrjj
                          Lifetime Qt Champion
                          wrote on last edited by
                          #13

                          Or I will need to run and debug my Qt applications using Ubuntu Terminal now?

                          no no, we just try to find out why it gives that error. i also had in Ubuntu Mint after an upgrade.

                          F 1 Reply Last reply
                          0
                          • F fem_dev

                            @JonB Yes, I can try to do it.

                            But, I always used the Qt Creator green "run" button.

                            Is it possible yet on Ubuntu 20.04?
                            Or I will need to run and debug my Qt applications using Ubuntu Terminal now?

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

                            @fem_dev said in Qt Creator + Ubuntu 20.04:

                            But, I always used the Qt Creator green "run" button.

                            Then read the manual about how to set an environment variable for your running your program from within Creator.

                            Or I will need to run and debug my Qt applications using Ubuntu Terminal now?

                            No, I'm just trying to get you to do something to get some information this time, but it's proving tricky! ;-)

                            1 Reply Last reply
                            1
                            • mrjjM mrjj

                              Or I will need to run and debug my Qt applications using Ubuntu Terminal now?

                              no no, we just try to find out why it gives that error. i also had in Ubuntu Mint after an upgrade.

                              F Offline
                              F Offline
                              fem_dev
                              wrote on last edited by fem_dev
                              #15

                              @mrjj @JonB

                              In the Ubuntu Terminal....I set the environment variable and run the compiled Qt example using:

                              ./addressbook
                              

                              I got this Terminal result:

                              QFactoryLoader::QFactoryLoader() checking directory path "/home/nyck/Qt/5.15.0/gcc_64/plugins/platforms" ...
                              QFactoryLoader::QFactoryLoader() looking at "/home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqeglfs.so"
                              Found metadata in lib /home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqeglfs.so, metadata=
                              {
                                  "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                                  "MetaData": {
                                      "Keys": [
                                          "eglfs"
                                      ]
                                  },
                                  "archreq": 0,
                                  "className": "QEglFSIntegrationPlugin",
                                  "debug": false,
                                  "version": 331520
                              }
                              
                              
                              Got keys from plugin meta data ("eglfs")
                              QFactoryLoader::QFactoryLoader() looking at "/home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqlinuxfb.so"
                              Found metadata in lib /home/nyck/Qt/5.15.0/gcc_64/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 "/home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqminimal.so"
                              Found metadata in lib /home/nyck/Qt/5.15.0/gcc_64/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 "/home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqminimalegl.so"
                              Found metadata in lib /home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqminimalegl.so, metadata=
                              {
                                  "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                                  "MetaData": {
                                      "Keys": [
                                          "minimalegl"
                                      ]
                                  },
                                  "archreq": 0,
                                  "className": "QMinimalEglIntegrationPlugin",
                                  "debug": false,
                                  "version": 331520
                              }
                              
                              
                              Got keys from plugin meta data ("minimalegl")
                              QFactoryLoader::QFactoryLoader() looking at "/home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqoffscreen.so"
                              Found metadata in lib /home/nyck/Qt/5.15.0/gcc_64/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 "/home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqvnc.so"
                              Found metadata in lib /home/nyck/Qt/5.15.0/gcc_64/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 "/home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqwayland-egl.so"
                              Found metadata in lib /home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqwayland-egl.so, metadata=
                              {
                                  "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                                  "MetaData": {
                                      "Keys": [
                                          "wayland-egl"
                                      ]
                                  },
                                  "archreq": 0,
                                  "className": "QWaylandEglPlatformIntegrationPlugin",
                                  "debug": false,
                                  "version": 331520
                              }
                              
                              
                              Got keys from plugin meta data ("wayland-egl")
                              QFactoryLoader::QFactoryLoader() looking at "/home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqwayland-generic.so"
                              Found metadata in lib /home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqwayland-generic.so, metadata=
                              {
                                  "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                                  "MetaData": {
                                      "Keys": [
                                          "wayland"
                                      ]
                                  },
                                  "archreq": 0,
                                  "className": "QWaylandIntegrationPlugin",
                                  "debug": false,
                                  "version": 331520
                              }
                              
                              
                              Got keys from plugin meta data ("wayland")
                              QFactoryLoader::QFactoryLoader() looking at "/home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqwayland-xcomposite-egl.so"
                              Found metadata in lib /home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqwayland-xcomposite-egl.so, metadata=
                              {
                                  "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                                  "MetaData": {
                                      "Keys": [
                                          "wayland-xcomposite-egl"
                                      ]
                                  },
                                  "archreq": 0,
                                  "className": "QWaylandXCompositeEglPlatformIntegrationPlugin",
                                  "debug": false,
                                  "version": 331520
                              }
                              
                              
                              Got keys from plugin meta data ("wayland-xcomposite-egl")
                              QFactoryLoader::QFactoryLoader() looking at "/home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqwayland-xcomposite-glx.so"
                              Found metadata in lib /home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqwayland-xcomposite-glx.so, metadata=
                              {
                                  "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                                  "MetaData": {
                                      "Keys": [
                                          "wayland-xcomposite-glx"
                                      ]
                                  },
                                  "archreq": 0,
                                  "className": "QWaylandXCompositeGlxPlatformIntegrationPlugin",
                                  "debug": false,
                                  "version": 331520
                              }
                              
                              
                              Got keys from plugin meta data ("wayland-xcomposite-glx")
                              QFactoryLoader::QFactoryLoader() looking at "/home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqxcb.so"
                              Found metadata in lib /home/nyck/Qt/5.15.0/gcc_64/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/nyck/Qt/Examples/Qt-5.15.0/widgets/itemviews/build-addressbook-Desktop_Qt_5_15_0_GCC_64bit-Debug/platforms" ...
                              Cannot load library /home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqxcb.so: (libxcb-xinerama.so.0: cannot open shared object file: No such file or directory)
                              QLibraryPrivate::loadPlugin failed on "/home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqxcb.so" : "Cannot load library /home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqxcb.so: (libxcb-xinerama.so.0: cannot open shared object file: No such file or directory)"
                              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, xcb.
                              
                              Aborted (core dumped)
                              
                              nyck@gs65:~/Qt/Examples/Qt-5.15.0/widgets/itemviews/build-addressbook-Desktop_Qt_5_15_0_GCC_64bit-Debug$ 
                              

                              Any ideas?

                              mrjjM 1 Reply Last reply
                              1
                              • F fem_dev

                                @mrjj @JonB

                                In the Ubuntu Terminal....I set the environment variable and run the compiled Qt example using:

                                ./addressbook
                                

                                I got this Terminal result:

                                QFactoryLoader::QFactoryLoader() checking directory path "/home/nyck/Qt/5.15.0/gcc_64/plugins/platforms" ...
                                QFactoryLoader::QFactoryLoader() looking at "/home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqeglfs.so"
                                Found metadata in lib /home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqeglfs.so, metadata=
                                {
                                    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                                    "MetaData": {
                                        "Keys": [
                                            "eglfs"
                                        ]
                                    },
                                    "archreq": 0,
                                    "className": "QEglFSIntegrationPlugin",
                                    "debug": false,
                                    "version": 331520
                                }
                                
                                
                                Got keys from plugin meta data ("eglfs")
                                QFactoryLoader::QFactoryLoader() looking at "/home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqlinuxfb.so"
                                Found metadata in lib /home/nyck/Qt/5.15.0/gcc_64/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 "/home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqminimal.so"
                                Found metadata in lib /home/nyck/Qt/5.15.0/gcc_64/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 "/home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqminimalegl.so"
                                Found metadata in lib /home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqminimalegl.so, metadata=
                                {
                                    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                                    "MetaData": {
                                        "Keys": [
                                            "minimalegl"
                                        ]
                                    },
                                    "archreq": 0,
                                    "className": "QMinimalEglIntegrationPlugin",
                                    "debug": false,
                                    "version": 331520
                                }
                                
                                
                                Got keys from plugin meta data ("minimalegl")
                                QFactoryLoader::QFactoryLoader() looking at "/home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqoffscreen.so"
                                Found metadata in lib /home/nyck/Qt/5.15.0/gcc_64/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 "/home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqvnc.so"
                                Found metadata in lib /home/nyck/Qt/5.15.0/gcc_64/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 "/home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqwayland-egl.so"
                                Found metadata in lib /home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqwayland-egl.so, metadata=
                                {
                                    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                                    "MetaData": {
                                        "Keys": [
                                            "wayland-egl"
                                        ]
                                    },
                                    "archreq": 0,
                                    "className": "QWaylandEglPlatformIntegrationPlugin",
                                    "debug": false,
                                    "version": 331520
                                }
                                
                                
                                Got keys from plugin meta data ("wayland-egl")
                                QFactoryLoader::QFactoryLoader() looking at "/home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqwayland-generic.so"
                                Found metadata in lib /home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqwayland-generic.so, metadata=
                                {
                                    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                                    "MetaData": {
                                        "Keys": [
                                            "wayland"
                                        ]
                                    },
                                    "archreq": 0,
                                    "className": "QWaylandIntegrationPlugin",
                                    "debug": false,
                                    "version": 331520
                                }
                                
                                
                                Got keys from plugin meta data ("wayland")
                                QFactoryLoader::QFactoryLoader() looking at "/home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqwayland-xcomposite-egl.so"
                                Found metadata in lib /home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqwayland-xcomposite-egl.so, metadata=
                                {
                                    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                                    "MetaData": {
                                        "Keys": [
                                            "wayland-xcomposite-egl"
                                        ]
                                    },
                                    "archreq": 0,
                                    "className": "QWaylandXCompositeEglPlatformIntegrationPlugin",
                                    "debug": false,
                                    "version": 331520
                                }
                                
                                
                                Got keys from plugin meta data ("wayland-xcomposite-egl")
                                QFactoryLoader::QFactoryLoader() looking at "/home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqwayland-xcomposite-glx.so"
                                Found metadata in lib /home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqwayland-xcomposite-glx.so, metadata=
                                {
                                    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                                    "MetaData": {
                                        "Keys": [
                                            "wayland-xcomposite-glx"
                                        ]
                                    },
                                    "archreq": 0,
                                    "className": "QWaylandXCompositeGlxPlatformIntegrationPlugin",
                                    "debug": false,
                                    "version": 331520
                                }
                                
                                
                                Got keys from plugin meta data ("wayland-xcomposite-glx")
                                QFactoryLoader::QFactoryLoader() looking at "/home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqxcb.so"
                                Found metadata in lib /home/nyck/Qt/5.15.0/gcc_64/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/nyck/Qt/Examples/Qt-5.15.0/widgets/itemviews/build-addressbook-Desktop_Qt_5_15_0_GCC_64bit-Debug/platforms" ...
                                Cannot load library /home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqxcb.so: (libxcb-xinerama.so.0: cannot open shared object file: No such file or directory)
                                QLibraryPrivate::loadPlugin failed on "/home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqxcb.so" : "Cannot load library /home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqxcb.so: (libxcb-xinerama.so.0: cannot open shared object file: No such file or directory)"
                                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, xcb.
                                
                                Aborted (core dumped)
                                
                                nyck@gs65:~/Qt/Examples/Qt-5.15.0/widgets/itemviews/build-addressbook-Desktop_Qt_5_15_0_GCC_64bit-Debug$ 
                                

                                Any ideas?

                                mrjjM Offline
                                mrjjM Offline
                                mrjj
                                Lifetime Qt Champion
                                wrote on last edited by
                                #16

                                Hi
                                Good work.

                                Got keys from plugin meta data ("xcb")
                                QFactoryLoader::QFactoryLoader() checking directory path "/home/nyck/Qt/Examples/Qt-5.15.0/widgets/itemviews/build-addressbook-Desktop_Qt_5_15_0_GCC_64bit-Debug/platforms" ...
                                Cannot load library /home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqxcb.so: (libxcb-xinerama.so.0: cannot open shared object file: No such file or directory)
                                QLibraryPrivate::loadPlugin failed on "/home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqxcb.so" : "Cannot load library /home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqxcb.so: (libxcb-xinerama.so.0: cannot open shared object file: No such file or directory)"
                                

                                aha !
                                libxcb-xinerama

                                try
                                apt-get install libxcb-xinerama

                                F 1 Reply Last reply
                                4
                                • mrjjM mrjj

                                  Hi
                                  Good work.

                                  Got keys from plugin meta data ("xcb")
                                  QFactoryLoader::QFactoryLoader() checking directory path "/home/nyck/Qt/Examples/Qt-5.15.0/widgets/itemviews/build-addressbook-Desktop_Qt_5_15_0_GCC_64bit-Debug/platforms" ...
                                  Cannot load library /home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqxcb.so: (libxcb-xinerama.so.0: cannot open shared object file: No such file or directory)
                                  QLibraryPrivate::loadPlugin failed on "/home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqxcb.so" : "Cannot load library /home/nyck/Qt/5.15.0/gcc_64/plugins/platforms/libqxcb.so: (libxcb-xinerama.so.0: cannot open shared object file: No such file or directory)"
                                  

                                  aha !
                                  libxcb-xinerama

                                  try
                                  apt-get install libxcb-xinerama

                                  F Offline
                                  F Offline
                                  fem_dev
                                  wrote on last edited by fem_dev
                                  #17

                                  @mrjj

                                  sudo apt-get install libxcb-xinerama

                                  E: Unable to locate package libxcb-xinerama

                                  mrjjM F 2 Replies Last reply
                                  0
                                  • F fem_dev

                                    @mrjj

                                    sudo apt-get install libxcb-xinerama

                                    E: Unable to locate package libxcb-xinerama

                                    mrjjM Offline
                                    mrjjM Offline
                                    mrjj
                                    Lifetime Qt Champion
                                    wrote on last edited by
                                    #18

                                    @fem_dev

                                    and you did do update ?

                                    sudo apt-get update

                                    1 Reply Last reply
                                    1
                                    • F fem_dev

                                      @mrjj

                                      sudo apt-get install libxcb-xinerama

                                      E: Unable to locate package libxcb-xinerama

                                      F Offline
                                      F Offline
                                      fem_dev
                                      wrote on last edited by
                                      #19

                                      @fem_dev

                                      Here is how to install the libxcb-xinerama:

                                      sudo apt-get install libxcb-randr0-dev libxcb-xtest0-dev libxcb-xinerama0-dev libxcb-shape0-dev libxcb-xkb-dev
                                      

                                      After that: it works!!!

                                      Thank you @mrjj and @JonB

                                      mrjjM 1 Reply Last reply
                                      4
                                      • F fem_dev

                                        @fem_dev

                                        Here is how to install the libxcb-xinerama:

                                        sudo apt-get install libxcb-randr0-dev libxcb-xtest0-dev libxcb-xinerama0-dev libxcb-shape0-dev libxcb-xkb-dev
                                        

                                        After that: it works!!!

                                        Thank you @mrjj and @JonB

                                        mrjjM Offline
                                        mrjjM Offline
                                        mrjj
                                        Lifetime Qt Champion
                                        wrote on last edited by
                                        #20

                                        @fem_dev
                                        Super!
                                        Im sure it will come often soon when people start to upgrade.

                                        1 Reply Last reply
                                        2
                                        • S Offline
                                          S Offline
                                          Saeed Magdy
                                          wrote on last edited by
                                          #21

                                          https://poe.com/s/fqPkHzQlb2YKt6j9JeAE

                                          1 Reply Last reply
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