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qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.

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  • I IuriiV

    @twar Hi, solved by sudo apt-get install libxcb*

    F Offline
    F Offline
    fokhagyma
    wrote on last edited by
    #153

    @IuriiV Thank you, it solved for me too.

    1 Reply Last reply
    0
    • B Offline
      B Offline
      booter
      wrote on last edited by
      #154

      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: offscreen, wayland, vnc, minimalegl, xcb, wayland-egl, eglfs, linuxfb, vkkhrdisplay, minimal.

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

      sudo apt-get install libxkbcommon-x11-dev

      sudo apt-get install libxcb-xinerama0

      ++++++++++++++++++++++++++++++++++

      sudo apt-get install -qq libglu1-mesa-dev libx11-xcb-dev '^libxcb*'

      jsulmJ 1 Reply Last reply
      0
      • B booter

        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: offscreen, wayland, vnc, minimalegl, xcb, wayland-egl, eglfs, linuxfb, vkkhrdisplay, minimal.

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

        sudo apt-get install libxkbcommon-x11-dev

        sudo apt-get install libxcb-xinerama0

        ++++++++++++++++++++++++++++++++++

        sudo apt-get install -qq libglu1-mesa-dev libx11-xcb-dev '^libxcb*'

        jsulmJ Offline
        jsulmJ Offline
        jsulm
        Lifetime Qt Champion
        wrote on last edited by
        #155

        @booter As in your other thread: do you have a question? Please ask a clear question if you have one!
        If you have same issue as in this thread then the solution should also be same: did you do that?

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

        S 1 Reply Last reply
        1
        • jsulmJ jsulm

          @booter As in your other thread: do you have a question? Please ask a clear question if you have one!
          If you have same issue as in this thread then the solution should also be same: did you do that?

          S Offline
          S Offline
          Spiv
          wrote on last edited by
          #156

          @jsulm
          Since I am getting the same error, I read the whole thread from the very beginning and tried all solutions but I still cannot load something....
          I have Lenovo Ideapad Flex5 running Kubuntu.
          I upgraded Kubuntu 20.04 first to 23.04,then to 23.10.
          Then something happened ...
          Now when I start the laptop I get to the login, put my password, the desktop and wallpaper show for 1 second, then I get a black screen.
          Using Ctrl+Alt+F4 I can get to a terminal, but a cannot copy/paste anything into a browser since I cannot load a browser because I get an error very similar to the original post.
          I am writing this through my phone.
          I can take pictures of the terminal and the result of commands, but cannot paste anything....
          Can you help me please regain my desktop display?

          BTW, how do I attach pictures here?

          SGaistS 1 Reply Last reply
          0
          • S Spiv

            @jsulm
            Since I am getting the same error, I read the whole thread from the very beginning and tried all solutions but I still cannot load something....
            I have Lenovo Ideapad Flex5 running Kubuntu.
            I upgraded Kubuntu 20.04 first to 23.04,then to 23.10.
            Then something happened ...
            Now when I start the laptop I get to the login, put my password, the desktop and wallpaper show for 1 second, then I get a black screen.
            Using Ctrl+Alt+F4 I can get to a terminal, but a cannot copy/paste anything into a browser since I cannot load a browser because I get an error very similar to the original post.
            I am writing this through my phone.
            I can take pictures of the terminal and the result of commands, but cannot paste anything....
            Can you help me please regain my desktop display?

            BTW, how do I attach pictures here?

            SGaistS Offline
            SGaistS Offline
            SGaist
            Lifetime Qt Champion
            wrote on last edited by
            #157

            @Spiv hi and welcome to devnet,

            Did you try to use the Wayland session rather than the Xorg ? You should be able to select that from the login screen.

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

            S 1 Reply Last reply
            0
            • SGaistS SGaist

              @Spiv hi and welcome to devnet,

              Did you try to use the Wayland session rather than the Xorg ? You should be able to select that from the login screen.

              S Offline
              S Offline
              Spiv
              wrote on last edited by
              #158

              @SGaist
              Hi, thank you for responding so quickly.
              I don't know what you are suggesting, sorry....
              How do I select a different (Wayland) session?

              S 1 Reply Last reply
              0
              • S Spiv

                @SGaist
                Hi, thank you for responding so quickly.
                I don't know what you are suggesting, sorry....
                How do I select a different (Wayland) session?

                S Offline
                S Offline
                Spiv
                wrote on last edited by Spiv
                #159

                I did figure that out...
                With 'Plasma Wayland' I did not even see a flash of my desktop, just a dark screen.
                'Plasma X11', desktop flash for a second, then black screen.
                'Ubuntu' gave me a blue screen on which I can invoke all applications, including Firefox.
                'Ubuntu Wayland' and 'Ubuntu on Xorg' also give me a working environment.
                However, I cannot go into 'settings' for some reason.

                SGaistS 1 Reply Last reply
                0
                • S Spiv

                  I did figure that out...
                  With 'Plasma Wayland' I did not even see a flash of my desktop, just a dark screen.
                  'Plasma X11', desktop flash for a second, then black screen.
                  'Ubuntu' gave me a blue screen on which I can invoke all applications, including Firefox.
                  'Ubuntu Wayland' and 'Ubuntu on Xorg' also give me a working environment.
                  However, I cannot go into 'settings' for some reason.

                  SGaistS Offline
                  SGaistS Offline
                  SGaist
                  Lifetime Qt Champion
                  wrote on last edited by
                  #160

                  Did you check the logs of your system to see if something else is wrong ?

                  In any case, I would also check with the Kubuntu folks.

                  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
                  • I IuriiV

                    @twar Hi, solved by sudo apt-get install libxcb*

                    O Offline
                    O Offline
                    Octopic
                    wrote on last edited by
                    #161

                    @IuriiV mee too. If someone could add it in first comment it would be really helpful ;-)

                    1 Reply Last reply
                    0
                    • M Offline
                      M Offline
                      mrt06
                      wrote on last edited by
                      #162

                      Hi, I am trying to run paraview for OpenFOAM but I have that error:

                      
mrt06@DESKTOP-JQP308P:~$ paraview
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: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, xcb.

Aborted

                      Then I tried with QT_DEBUG_PLUGINS=1:

                      mrt06@DESKTOP-JQP308P:~$ export QT_DEBUG_PLUGINS=1
mrt06@DESKTOP-JQP308P:~$ paraview
QFactoryLoader::QFactoryLoader() checking directory path "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqeglfs.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/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 "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqlinuxfb.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/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 "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqminimal.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/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 "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqminimalegl.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/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 "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqoffscreen.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/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 "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqvnc.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/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 "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/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 "/usr/bin/platforms" ...
loaded library "/usr/lib/x86_64-linux-gnu/qt5/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: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, xcb.

Aborted

                      After that I wrote that line without any conscious and get that:

                      mrt06@DESKTOP-JQP308P:~$ ldd /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
        linux-vdso.so.1 (0x00007fff2fbd8000)
        libQt5XcbQpa.so.5 => /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5 (0x00007f10aff1b000)
        libQt5Gui.so.5 => /lib/x86_64-linux-gnu/libQt5Gui.so.5 (0x00007f10af83d000)
        libQt5Core.so.5 => /lib/x86_64-linux-gnu/libQt5Core.so.5 (0x00007f10af2de000)
        libstdc++.so.6 => /lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f10af0b2000)
        libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f10aee88000)
        libfontconfig.so.1 => /lib/x86_64-linux-gnu/libfontconfig.so.1 (0x00007f10aee3e000)
        libfreetype.so.6 => /lib/x86_64-linux-gnu/libfreetype.so.6 (0x00007f10aed76000)
        libQt5DBus.so.5 => /lib/x86_64-linux-gnu/libQt5DBus.so.5 (0x00007f10aece2000)
        libX11-xcb.so.1 => /lib/x86_64-linux-gnu/libX11-xcb.so.1 (0x00007f10aecdd000)
        libxcb-icccm.so.4 => /lib/x86_64-linux-gnu/libxcb-icccm.so.4 (0x00007f10aecd6000)
        libxcb-image.so.0 => /lib/x86_64-linux-gnu/libxcb-image.so.0 (0x00007f10aecce000)
        libxcb-shm.so.0 => /lib/x86_64-linux-gnu/libxcb-shm.so.0 (0x00007f10aecc9000)
        libxcb-keysyms.so.1 => /lib/x86_64-linux-gnu/libxcb-keysyms.so.1 (0x00007f10aecc4000)
        libxcb-randr.so.0 => /lib/x86_64-linux-gnu/libxcb-randr.so.0 (0x00007f10aecb1000)
        libxcb-render-util.so.0 => /lib/x86_64-linux-gnu/libxcb-render-util.so.0 (0x00007f10aecaa000)
        libxcb-render.so.0 => /lib/x86_64-linux-gnu/libxcb-render.so.0 (0x00007f10aec9b000)
        libxcb-shape.so.0 => /lib/x86_64-linux-gnu/libxcb-shape.so.0 (0x00007f10aec94000)
        libxcb-sync.so.1 => /lib/x86_64-linux-gnu/libxcb-sync.so.1 (0x00007f10aec8a000)
        libxcb-xfixes.so.0 => /lib/x86_64-linux-gnu/libxcb-xfixes.so.0 (0x00007f10aec80000)
        libxcb-xinerama.so.0 => /lib/x86_64-linux-gnu/libxcb-xinerama.so.0 (0x00007f10aec7b000)
        libxcb-xkb.so.1 => /lib/x86_64-linux-gnu/libxcb-xkb.so.1 (0x00007f10aec5d000)
        libxcb-xinput.so.0 => /lib/x86_64-linux-gnu/libxcb-xinput.so.0 (0x00007f10aec39000)
        libxcb.so.1 => /lib/x86_64-linux-gnu/libxcb.so.1 (0x00007f10aec0d000)
        libXrender.so.1 => /lib/x86_64-linux-gnu/libXrender.so.1 (0x00007f10aec00000)
        libX11.so.6 => /lib/x86_64-linux-gnu/libX11.so.6 (0x00007f10aeac0000)
        libSM.so.6 => /lib/x86_64-linux-gnu/libSM.so.6 (0x00007f10aeab5000)
        libICE.so.6 => /lib/x86_64-linux-gnu/libICE.so.6 (0x00007f10aea98000)
        libxkbcommon-x11.so.0 => /lib/x86_64-linux-gnu/libxkbcommon-x11.so.0 (0x00007f10aea8d000)
        libxkbcommon.so.0 => /lib/x86_64-linux-gnu/libxkbcommon.so.0 (0x00007f10aea44000)
        libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007f10ae90a000)
        libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f10ae823000)
        libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f10ae803000)
        libGL.so.1 => /lib/x86_64-linux-gnu/libGL.so.1 (0x00007f10ae77c000)
        libpng16.so.16 => /lib/x86_64-linux-gnu/libpng16.so.16 (0x00007f10ae73f000)
        libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f10ae723000)
        libharfbuzz.so.0 => /lib/x86_64-linux-gnu/libharfbuzz.so.0 (0x00007f10ae654000)
        libmd4c.so.0 => /lib/x86_64-linux-gnu/libmd4c.so.0 (0x00007f10ae642000)
        libdouble-conversion.so.3 => /lib/x86_64-linux-gnu/libdouble-conversion.so.3 (0x00007f10ae62d000)
        libicui18n.so.70 => /lib/x86_64-linux-gnu/libicui18n.so.70 (0x00007f10ae2fe000)
        libicuuc.so.70 => /lib/x86_64-linux-gnu/libicuuc.so.70 (0x00007f10ae101000)
        libpcre2-16.so.0 => /lib/x86_64-linux-gnu/libpcre2-16.so.0 (0x00007f10ae077000)
        libzstd.so.1 => /lib/x86_64-linux-gnu/libzstd.so.1 (0x00007f10adfa8000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f10b00b4000)
        libexpat.so.1 => /lib/x86_64-linux-gnu/libexpat.so.1 (0x00007f10adf77000)
        libuuid.so.1 => /lib/x86_64-linux-gnu/libuuid.so.1 (0x00007f10adf6e000)
        libbrotlidec.so.1 => /lib/x86_64-linux-gnu/libbrotlidec.so.1 (0x00007f10adf5e000)
        libdbus-1.so.3 => /lib/x86_64-linux-gnu/libdbus-1.so.3 (0x00007f10adf10000)
        libxcb-util.so.1 => /lib/x86_64-linux-gnu/libxcb-util.so.1 (0x00007f10adf07000)
        libXau.so.6 => /lib/x86_64-linux-gnu/libXau.so.6 (0x00007f10adf01000)
        libXdmcp.so.6 => /lib/x86_64-linux-gnu/libXdmcp.so.6 (0x00007f10adef9000)
        libbsd.so.0 => /lib/x86_64-linux-gnu/libbsd.so.0 (0x00007f10adedf000)
        libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007f10ade69000)
        libGLdispatch.so.0 => /lib/x86_64-linux-gnu/libGLdispatch.so.0 (0x00007f10addb1000)
        libGLX.so.0 => /lib/x86_64-linux-gnu/libGLX.so.0 (0x00007f10add7d000)
        libgraphite2.so.3 => /lib/x86_64-linux-gnu/libgraphite2.so.3 (0x00007f10add56000)
        libicudata.so.70 => /lib/x86_64-linux-gnu/libicudata.so.70 (0x00007f10ac136000)
        libbrotlicommon.so.1 => /lib/x86_64-linux-gnu/libbrotlicommon.so.1 (0x00007f10ac113000)
        libsystemd.so.0 => /lib/x86_64-linux-gnu/libsystemd.so.0 (0x00007f10ac04c000)
        libmd.so.0 => /lib/x86_64-linux-gnu/libmd.so.0 (0x00007f10ac03f000)
        liblzma.so.5 => /lib/x86_64-linux-gnu/liblzma.so.5 (0x00007f10ac014000)
        liblz4.so.1 => /lib/x86_64-linux-gnu/liblz4.so.1 (0x00007f10abff2000)
        libcap.so.2 => /lib/x86_64-linux-gnu/libcap.so.2 (0x00007f10abfe7000)
        libgcrypt.so.20 => /lib/x86_64-linux-gnu/libgcrypt.so.20 (0x00007f10abea9000)
        libgpg-error.so.0 => /lib/x86_64-linux-gnu/libgpg-error.so.0 (0x00007f10abe83000)

                      I am using wsl2 Ubuntu and I have no idea with Linux. Can you please tell me what should I do? I tried to install libraries but nothing is changed

                      1 Reply Last reply
                      0
                      • hskoglundH Offline
                        hskoglundH Offline
                        hskoglund
                        wrote on last edited by
                        #163

                        Hi, maybe your wsl2 needs an X Server to be running, or perhaps you have no vGPU driver installed. Or your Windows 10 is too old so you need to upgrade to Windows 11. More here

                        M 2 Replies Last reply
                        2
                        • hskoglundH hskoglund

                          Hi, maybe your wsl2 needs an X Server to be running, or perhaps you have no vGPU driver installed. Or your Windows 10 is too old so you need to upgrade to Windows 11. More here

                          M Offline
                          M Offline
                          mrt06
                          wrote on last edited by mrt06
                          #164
                          This post is deleted!
                          1 Reply Last reply
                          0
                          • T twar

                            The same as before:

                            ~ $ ldd /usr/lib/qt/plugins/platforms/libqxcb.so
/usr/lib/qt/plugins/platforms/libqxcb.so: error while loading shared libraries: /usr/lib/libxcb-xinerama.so.0: invalid ELF header

                            but after that

                            ~ $ sudo pacman -S libxcb
[sudo] password for tomasz: 
warning: libxcb-1.13-1 is up to date -- reinstalling
resolving dependencies...
looking for conflicting packages...

Packages (1) libxcb-1.13-1

Total Download Size:   0.99 MiB
Total Installed Size:  3.96 MiB
Net Upgrade Size:      0.00 MiB

:: Proceed with installation? [Y/n] Y
:: Retrieving packages...
 libxcb-1.13-1-x86_64          1017.5 KiB   242K/s 00:04 [##############################] 100%
(1/1) checking keys in keyring                           [##############################] 100%
(1/1) checking package integrity                         [##############################] 100%
(1/1) loading package files                              [##############################] 100%
(1/1) checking for file conflicts                        [##############################] 100%
(1/1) checking available disk space                      [##############################] 100%
:: Processing package changes...
(1/1) reinstalling libxcb                                [##############################] 100%
:: Running post-transaction hooks...
(1/1) Arming ConditionNeedsUpdate...
~ $ pacman -Qo /usr/lib/libxcb-xinerama.so.0
/usr/lib/libxcb-xinerama.so.0 is owned by libxcb 1.13-1
~ $ ldd /usr/lib/qt/plugins/platforms/libqxcb.so
	linux-vdso.so.1 (0x00007ffc93f56000)
	libQt5XcbQpa.so.5 => /usr/lib/libQt5XcbQpa.so.5 (0x00007f730ea63000)
	libQt5Gui.so.5 => /usr/lib/libQt5Gui.so.5 (0x00007f730e2d5000)
	libQt5Core.so.5 => /usr/lib/libQt5Core.so.5 (0x00007f730dbd4000)
	libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00007f730d84b000)
	libc.so.6 => /usr/lib/libc.so.6 (0x00007f730d48f000)
	libfontconfig.so.1 => /usr/lib/libfontconfig.so.1 (0x00007f730d24c000)
	libfreetype.so.6 => /usr/lib/libfreetype.so.6 (0x00007f730cf83000)
	libQt5DBus.so.5 => /usr/lib/libQt5DBus.so.5 (0x00007f730ccf3000)
	libpthread.so.0 => /usr/lib/libpthread.so.0 (0x00007f730cad5000)
	libX11-xcb.so.1 => /usr/lib/libX11-xcb.so.1 (0x00007f730c8d3000)
	libX11.so.6 => /usr/lib/libX11.so.6 (0x00007f730c594000)
	libXi.so.6 => /usr/lib/libXi.so.6 (0x00007f730c383000)
	libSM.so.6 => /usr/lib/libSM.so.6 (0x00007f730c17b000)
	libICE.so.6 => /usr/lib/libICE.so.6 (0x00007f730bf5f000)
	libXrender.so.1 => /usr/lib/libXrender.so.1 (0x00007f730bd54000)
	libxcb-xkb.so.1 => /usr/lib/libxcb-xkb.so.1 (0x00007f730bb37000)
	libxcb-render-util.so.0 => /usr/lib/libxcb-render-util.so.0 (0x00007f730b933000)
	libxcb-render.so.0 => /usr/lib/libxcb-render.so.0 (0x00007f730b725000)
	libxcb-sync.so.1 => /usr/lib/libxcb-sync.so.1 (0x00007f730b51e000)
	libxcb-xfixes.so.0 => /usr/lib/libxcb-xfixes.so.0 (0x00007f730b316000)
	libxcb-xinerama.so.0 => /usr/lib/libxcb-xinerama.so.0 (0x00007f730b113000)
	libxcb-randr.so.0 => /usr/lib/libxcb-randr.so.0 (0x00007f730af03000)
	libxcb-image.so.0 => /usr/lib/libxcb-image.so.0 (0x00007f730acfe000)
	libxcb-shm.so.0 => /usr/lib/libxcb-shm.so.0 (0x00007f730aafa000)
	libxcb-keysyms.so.1 => /usr/lib/libxcb-keysyms.so.1 (0x00007f730a8f7000)
	libxcb-icccm.so.4 => /usr/lib/libxcb-icccm.so.4 (0x00007f730a6f2000)
	libxcb.so.1 => /usr/lib/libxcb.so.1 (0x00007f730a4c9000)
	libxcb-shape.so.0 => /usr/lib/libxcb-shape.so.0 (0x00007f730a2c5000)
	libxkbcommon.so.0 => /usr/lib/libxkbcommon.so.0 (0x00007f730a086000)
	libxkbcommon-x11.so.0 => /usr/lib/libxkbcommon-x11.so.0 (0x00007f7309e7f000)
	libm.so.6 => /usr/lib/libm.so.6 (0x00007f7309aea000)
	libgcc_s.so.1 => /usr/lib/libgcc_s.so.1 (0x00007f73098d2000)
	libGL.so.1 => /usr/lib/libGL.so.1 (0x00007f7309647000)
	libpng16.so.16 => /usr/lib/libpng16.so.16 (0x00007f7309411000)
	libharfbuzz.so.0 => /usr/lib/libharfbuzz.so.0 (0x00007f7309165000)
	libz.so.1 => /usr/lib/libz.so.1 (0x00007f7308f4e000)
	libsystemd.so.0 => /usr/lib/libsystemd.so.0 (0x00007f7308cc4000)
	libicui18n.so.61 => /usr/lib/libicui18n.so.61 (0x00007f7308819000)
	libicuuc.so.61 => /usr/lib/libicuuc.so.61 (0x00007f730845f000)
	libpcre2-16.so.0 => /usr/lib/libpcre2-16.so.0 (0x00007f73081e8000)
	libdouble-conversion.so.1 => /usr/lib/libdouble-conversion.so.1 (0x00007f7307fd8000)
	libdl.so.2 => /usr/lib/libdl.so.2 (0x00007f7307dd4000)
	libglib-2.0.so.0 => /usr/lib/libglib-2.0.so.0 (0x00007f7307abd000)
	/usr/lib64/ld-linux-x86-64.so.2 (0x00007f730efdd000)
	libexpat.so.1 => /usr/lib/libexpat.so.1 (0x00007f730788b000)
	libuuid.so.1 => /usr/lib/libuuid.so.1 (0x00007f7307684000)
	libbz2.so.1.0 => /usr/lib/libbz2.so.1.0 (0x00007f7307474000)
	libdbus-1.so.3 => /usr/lib/libdbus-1.so.3 (0x00007f7307223000)
	libXext.so.6 => /usr/lib/libXext.so.6 (0x00007f7307011000)
	libXau.so.6 => /usr/lib/libXau.so.6 (0x00007f7306e0d000)
	libXdmcp.so.6 => /usr/lib/libXdmcp.so.6 (0x00007f7306c07000)
	libxcb-util.so.1 => /usr/lib/libxcb-util.so.1 (0x00007f7306a01000)
	libGLX.so.0 => /usr/lib/libGLX.so.0 (0x00007f73067d0000)
	libGLdispatch.so.0 => /usr/lib/libGLdispatch.so.0 (0x00007f730651a000)
	libgraphite2.so.3 => /usr/lib/libgraphite2.so.3 (0x00007f73062ee000)
	librt.so.1 => /usr/lib/librt.so.1 (0x00007f73060e6000)
	liblzma.so.5 => /usr/lib/liblzma.so.5 (0x00007f7305ec0000)
	liblz4.so.1 => /usr/lib/liblz4.so.1 (0x00007f7305ca3000)
	libgcrypt.so.20 => /usr/lib/libgcrypt.so.20 (0x00007f7305987000)
	libicudata.so.61 => /usr/lib/libicudata.so.61 (0x00007f7303de2000)
	libpcre.so.1 => /usr/lib/libpcre.so.1 (0x00007f7303b70000)
	libgpg-error.so.0 => /usr/lib/libgpg-error.so.0 (0x00007f7303950000)
~ $ qtcreator
QApplication: invalid style override passed, ignoring it.

                            so it seems that reinstalling libxcb fixed the issue. So thank you very much guys.
                            I own you really big beer :-)

                            @SGaist
                            there is no such thing on manjaro or archlinux which manjaro is baseed on

                            D Offline
                            D Offline
                            Drexel
                            wrote on last edited by
                            #165

                            Had the same problem today. Activated QT_DEBUG_PLUGINS:

                            (.venv) raspifm@raspifm:~/Documents/src/raspiFM $  cd /home/raspifm/Documents/src/raspiFM ; /usr/bin/env /home/raspifm/Documents/src/raspiFM/.venv/bin/python /home/raspifm/.vscode/extensions/ms-python.python-2023.20.0/pythonFiles/lib/python/debugpy/adapter/../../debugpy/launcher 37365 -- -m src.touchui 
qt.core.plugin.factoryloader: checking directory path "/home/raspifm/Documents/src/raspiFM/.venv/lib/python3.11/site-packages/PySide6/Qt/plugins/platforms" ...
qt.core.plugin.factoryloader: looking at "/home/raspifm/Documents/src/raspiFM/.venv/lib/python3.11/site-packages/PySide6/Qt/plugins/platforms/libqwayland-egl.so"
qt.core.plugin.loader: Found metadata in lib /home/raspifm/Documents/src/raspiFM/.venv/lib/python3.11/site-packages/PySide6/Qt/plugins/platforms/libqwayland-egl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland-egl"
        ]
    },
    "archlevel": 0,
    "className": "QWaylandEglPlatformIntegrationPlugin",
    "debug": false,
    "version": 394752
}


qt.core.plugin.factoryloader: Got keys from plugin meta data QList("wayland-egl")
qt.core.plugin.factoryloader: looking at "/home/raspifm/Documents/src/raspiFM/.venv/lib/python3.11/site-packages/PySide6/Qt/plugins/platforms/libqoffscreen.so"
qt.core.plugin.loader: Found metadata in lib /home/raspifm/Documents/src/raspiFM/.venv/lib/python3.11/site-packages/PySide6/Qt/plugins/platforms/libqoffscreen.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "offscreen"
        ]
    },
    "archlevel": 0,
    "className": "QOffscreenIntegrationPlugin",
    "debug": false,
    "version": 394752
}


qt.core.plugin.factoryloader: Got keys from plugin meta data QList("offscreen")
qt.core.plugin.factoryloader: looking at "/home/raspifm/Documents/src/raspiFM/.venv/lib/python3.11/site-packages/PySide6/Qt/plugins/platforms/libqlinuxfb.so"
qt.core.plugin.loader: Found metadata in lib /home/raspifm/Documents/src/raspiFM/.venv/lib/python3.11/site-packages/PySide6/Qt/plugins/platforms/libqlinuxfb.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "linuxfb"
        ]
    },
    "archlevel": 0,
    "className": "QLinuxFbIntegrationPlugin",
    "debug": false,
    "version": 394752
}


qt.core.plugin.factoryloader: Got keys from plugin meta data QList("linuxfb")
qt.core.plugin.factoryloader: looking at "/home/raspifm/Documents/src/raspiFM/.venv/lib/python3.11/site-packages/PySide6/Qt/plugins/platforms/libqxcb.so"
qt.core.plugin.loader: Found metadata in lib /home/raspifm/Documents/src/raspiFM/.venv/lib/python3.11/site-packages/PySide6/Qt/plugins/platforms/libqxcb.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "xcb"
        ]
    },
    "archlevel": 0,
    "className": "QXcbIntegrationPlugin",
    "debug": false,
    "version": 394752
}


qt.core.plugin.factoryloader: Got keys from plugin meta data QList("xcb")
qt.core.plugin.factoryloader: looking at "/home/raspifm/Documents/src/raspiFM/.venv/lib/python3.11/site-packages/PySide6/Qt/plugins/platforms/libqvnc.so"
qt.core.plugin.loader: Found metadata in lib /home/raspifm/Documents/src/raspiFM/.venv/lib/python3.11/site-packages/PySide6/Qt/plugins/platforms/libqvnc.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "vnc"
        ]
    },
    "archlevel": 0,
    "className": "QVncIntegrationPlugin",
    "debug": false,
    "version": 394752
}


qt.core.plugin.factoryloader: Got keys from plugin meta data QList("vnc")
qt.core.plugin.factoryloader: looking at "/home/raspifm/Documents/src/raspiFM/.venv/lib/python3.11/site-packages/PySide6/Qt/plugins/platforms/libqminimalegl.so"
qt.core.plugin.loader: Found metadata in lib /home/raspifm/Documents/src/raspiFM/.venv/lib/python3.11/site-packages/PySide6/Qt/plugins/platforms/libqminimalegl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimalegl"
        ]
    },
    "archlevel": 0,
    "className": "QMinimalEglIntegrationPlugin",
    "debug": false,
    "version": 394752
}


qt.core.plugin.factoryloader: Got keys from plugin meta data QList("minimalegl")
qt.core.plugin.factoryloader: looking at "/home/raspifm/Documents/src/raspiFM/.venv/lib/python3.11/site-packages/PySide6/Qt/plugins/platforms/libqvkkhrdisplay.so"
qt.core.plugin.loader: Found metadata in lib /home/raspifm/Documents/src/raspiFM/.venv/lib/python3.11/site-packages/PySide6/Qt/plugins/platforms/libqvkkhrdisplay.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "vkkhrdisplay"
        ]
    },
    "archlevel": 0,
    "className": "QVkKhrDisplayIntegrationPlugin",
    "debug": false,
    "version": 394752
}


qt.core.plugin.factoryloader: Got keys from plugin meta data QList("vkkhrdisplay")
qt.core.plugin.factoryloader: looking at "/home/raspifm/Documents/src/raspiFM/.venv/lib/python3.11/site-packages/PySide6/Qt/plugins/platforms/libqwayland-generic.so"
qt.core.plugin.loader: Found metadata in lib /home/raspifm/Documents/src/raspiFM/.venv/lib/python3.11/site-packages/PySide6/Qt/plugins/platforms/libqwayland-generic.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland"
        ]
    },
    "archlevel": 0,
    "className": "QWaylandIntegrationPlugin",
    "debug": false,
    "version": 394752
}


qt.core.plugin.factoryloader: Got keys from plugin meta data QList("wayland")
qt.core.plugin.factoryloader: looking at "/home/raspifm/Documents/src/raspiFM/.venv/lib/python3.11/site-packages/PySide6/Qt/plugins/platforms/libqeglfs.so"
qt.core.plugin.loader: Found metadata in lib /home/raspifm/Documents/src/raspiFM/.venv/lib/python3.11/site-packages/PySide6/Qt/plugins/platforms/libqeglfs.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "eglfs"
        ]
    },
    "archlevel": 0,
    "className": "QEglFSIntegrationPlugin",
    "debug": false,
    "version": 394752
}


qt.core.plugin.factoryloader: Got keys from plugin meta data QList("eglfs")
qt.core.plugin.factoryloader: looking at "/home/raspifm/Documents/src/raspiFM/.venv/lib/python3.11/site-packages/PySide6/Qt/plugins/platforms/libqminimal.so"
qt.core.plugin.loader: Found metadata in lib /home/raspifm/Documents/src/raspiFM/.venv/lib/python3.11/site-packages/PySide6/Qt/plugins/platforms/libqminimal.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimal"
        ]
    },
    "archlevel": 0,
    "className": "QMinimalIntegrationPlugin",
    "debug": false,
    "version": 394752
}


qt.core.plugin.factoryloader: Got keys from plugin meta data QList("minimal")
qt.core.plugin.factoryloader: checking directory path "/usr/bin/platforms" ...
qt.core.library: "/home/raspifm/Documents/src/raspiFM/.venv/lib/python3.11/site-packages/PySide6/Qt/plugins/platforms/libqxcb.so" cannot load: Cannot load library /home/raspifm/Documents/src/raspiFM/.venv/lib/python3.11/site-packages/PySide6/Qt/plugins/platforms/libqxcb.so: (libxcb-cursor.so.0: cannot open shared object file: No such file or directory)
qt.core.plugin.loader: QLibraryPrivate::loadPlugin failed on "/home/raspifm/Documents/src/raspiFM/.venv/lib/python3.11/site-packages/PySide6/Qt/plugins/platforms/libqxcb.so" : "Cannot load library /home/raspifm/Documents/src/raspiFM/.venv/lib/python3.11/site-packages/PySide6/Qt/plugins/platforms/libqxcb.so: (libxcb-cursor.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: wayland-egl, offscreen, linuxfb, xcb, vnc, minimalegl, vkkhrdisplay, wayland, eglfs, minimal.

                            Installed package libxcb-cursor0 and now it works....

                            1 Reply Last reply
                            0
                            • hskoglundH hskoglund

                              Hi, maybe your wsl2 needs an X Server to be running, or perhaps you have no vGPU driver installed. Or your Windows 10 is too old so you need to upgrade to Windows 11. More here

                              M Offline
                              M Offline
                              mrt06
                              wrote on last edited by
                              #166

                              @hskoglund I updated my wsl and problem solved. thank you.

                              T 1 Reply Last reply
                              0
                              • J Offline
                                J Offline
                                jonathan.taylor
                                wrote on last edited by
                                #167

                                I just spun up a fresh Ubuntu 23.10 box with default options selected. From there, I tried installing Qt first thing.

                                I couldn't launch the Qt Maintenance tool / installer until I did this:

                                sudo apt-get install -y build-essential libx11-xcb-dev libglu1-mesa-dev libxcb-xinerama0

                                After installation, I still couldn't launch Creator, running into error "qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found."

                                So, I found this web page (which appears to be for the benefit of Stamford students working on something or another I didn't bother trying to figure out) on how to install Qt on Linux: https://web.stanford.edu/dept/cs_edu/resources/qt/install-linux They aren't explicit about the Qt version the instructions at targeting, but there is a screenshot showing v6.5. I was aiming for v6.6.1 using Creator v12.0.1 and this worked for that as well.

                                That link says before doing anything (including running the installer) do this:

                                sudo apt-get update && sudo apt-get upgrade

                                That's obvious, of course, since it's the first step to most every such problem!

                                Then, they say do this:

                                sudo apt-get -y install build-essential openssl libssl-dev libssl1.0 libgl1-mesa-dev libqt5x11extras5 '^libxcb.*-dev' libx11-xcb-dev libglu1-mesa-dev libxrender-dev libxi-dev libxkbcommon-dev libxkbcommon-x11-dev

                                Once I ran that, the problem was resolved!

                                This is a shotgun approach, which I did rather blindly (as is common to do with cutting & pasting suggested solutions into Linux terminals when we just want to move forward without a deep dive!). I'm not sure that all of that is really needed (like qt 5 stuff?). It seems likely those are all the dependencies from whatever specifically those students needed for their project. If anyone wants to try this one-by-one and confirm the exact minimum requirements, that would be great! I figure I'll do that at some point, but not today...

                                1 Reply Last reply
                                0
                                • M mrt06

                                  @hskoglund I updated my wsl and problem solved. thank you.

                                  T Offline
                                  T Offline
                                  Taufamozai
                                  wrote on last edited by
                                  #168
                                  This post is deleted!
                                  1 Reply Last reply
                                  0
                                  • _ Offline
                                    _ Offline
                                    _APM_
                                    wrote on last edited by
                                    #169

                                    root@beaglebone-yocto:/# cd usr/bin
                                    root@beaglebone-yocto:/usr/bin# ./calculator
                                    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: minimal, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, xcb.

                                    Aborted
                                    root@beaglebone-yocto:/usr/bin#
                                    i got same error,sir can you explain what is the error ?

                                    jsulmJ 1 Reply Last reply
                                    0
                                    • _ _APM_

                                      root@beaglebone-yocto:/# cd usr/bin
                                      root@beaglebone-yocto:/usr/bin# ./calculator
                                      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: minimal, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, xcb.

                                      Aborted
                                      root@beaglebone-yocto:/usr/bin#
                                      i got same error,sir can you explain what is the error ?

                                      jsulmJ Offline
                                      jsulmJ Offline
                                      jsulm
                                      Lifetime Qt Champion
                                      wrote on last edited by
                                      #170

                                      @_APM_ said in qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.:

                                      i got same error,sir can you explain what is the error ?

                                      Is X11 server running?

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

                                      1 Reply Last reply
                                      1
                                      • S Offline
                                        S Offline
                                        StevenlAFl
                                        wrote on last edited by
                                        #171

                                        I got this error when loading a QT6 program that didn't ship the required QT6 plugins. Instead, the plugin package loaded was a QT5 one, so there was a mismatch.

                                        apt-get install qt6-qpa-plugins will install the libqxcb.so file required along with libqeglfs.so, libqminimalegl.so, libqoffscreen.so, libqvnc.so, libqlinuxfb.so, libqminimal.so and libqvkkhrdisplay.so.

                                        1 Reply Last reply
                                        0
                                        • A Offline
                                          A Offline
                                          ami01
                                          wrote on last edited by
                                          #172

                                          same error
                                          trying to run autolabelimg on my local machine
                                          github repo - https://github.com/wufan-tb/AutoLabelImg

                                          while doing the same the error I am getting continuously while trying to open the software is -
                                          (ano) workstation@workstation-HP-Z4-G4-Workstation:~/AutoLabelImg$ python labelImg.py
                                          QObject::moveToThread: Current thread (0x5616f4c8c8c0) is not the object's thread (0x5616f9c826f0).
                                          Cannot move to target thread (0x5616f4c8c8c0)

                                          qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "/home/workstation/anaconda3/envs/ano/lib/python3.7/site-packages/cv2/qt/plugins" even though it was found.
                                          This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

                                          Available platform plugins are: xcb, eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, webgl.

                                          Aborted (core dumped)

                                          have tried reinstalling libxcb, i have tried export Qt platform plugin set command also, have tried the famous sudo apt-get install libxcb-xinerama0 command also, nothing is helping

                                          using ubuntu 20.04, can someone please help

                                          jsulmJ 2 Replies Last reply
                                          0

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