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qt.qpa.plugin: Could not load the Qt platform plugin "xcb"

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  • P Puddies

    The output has 15543 lines. I am not allowed to post a text with that length here. Can I append a text file here?

    The output starts with

    QFactoryLoader::QFactoryLoader() checking directory path "/home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins" ...
    QFactoryLoader::QFactoryLoader() checking directory path "/usr/lib/qt/plugins" ...
    QFactoryLoader::QFactoryLoader() looking at "/usr/lib/qt/plugins/ownclouddolphinactionplugin.so"
    Found metadata in lib /usr/lib/qt/plugins/ownclouddolphinactionplugin.so, metadata=
    {
        "IID": "org.kde.KPluginFactory",
        "archreq": 0,
        "className": "OwncloudDolphinPluginActionFactory",
        "debug": false,
        "version": 331520
    }
    
    
    Got keys from plugin meta data ()
    QFactoryLoader::QFactoryLoader() looking at "/usr/lib/qt/plugins/owncloudsync_vfs_suffix.so"
    Found metadata in lib /usr/lib/qt/plugins/owncloudsync_vfs_suffix.so, metadata=
    {
        "IID": "org.owncloud.PluginFactory",
        "MetaData": {
            "type": "vfs",
            "version": "2.8.2"
        },
        "archreq": 0,
        "className": "SuffixVfsPluginFactory",
        "debug": false,
        "version": 331520
    }
    

    and it ends with

    QFactoryLoader::QFactoryLoader() checking directory path "/home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins" ...
    QFactoryLoader::QFactoryLoader() checking directory path "/usr/lib/qt/plugins" ...
    QFactoryLoader::QFactoryLoader() looking at "/usr/lib/qt/plugins/ownclouddolphinactionplugin.so"
    Found metadata in lib /usr/lib/qt/plugins/ownclouddolphinactionplugin.so, metadata=
    {
        "IID": "org.kde.KPluginFactory",
        "archreq": 0,
        "className": "OwncloudDolphinPluginActionFactory",
        "debug": false,
        "version": 331520
    }
    
    
    Got keys from plugin meta data ()
    QFactoryLoader::QFactoryLoader() looking at "/usr/lib/qt/plugins/owncloudsync_vfs_suffix.so"
    Found metadata in lib /usr/lib/qt/plugins/owncloudsync_vfs_suffix.so, metadata=
    {
        "IID": "org.owncloud.PluginFactory",
        "MetaData": {
            "type": "vfs",
            "version": "2.8.2"
        },
        "archreq": 0,
        "className": "SuffixVfsPluginFactory",
        "debug": false,
        "version": 331520
    }
    

    I dont know, if that helps.

    jsulmJ Online
    jsulmJ Online
    jsulm
    Lifetime Qt Champion
    wrote on last edited by
    #4

    @Puddies said in qt.qpa.plugin: Could not load the Qt platform plugin "xcb":

    I dont know, if that helps.

    It does not. Please post whole output or at least the part where xcb platform plug-in is loaded...

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

    1 Reply Last reply
    2
    • P Offline
      P Offline
      Puddies
      wrote on last edited by
      #5

      I am very sorry, but I had to upload the output to my dropbox. I am not able to post a text with more than about 32000 characters here.

      Here is the link with the full output:
      https://www.dropbox.com/s/k8eahgu3neesxe6/output.txt?dl=0

      1 Reply Last reply
      0
      • P Offline
        P Offline
        Puddies
        wrote on last edited by
        #6

        Ok, I have found the xcb part. Maybe this helps a bit:

        QFactoryLoader::QFactoryLoader() checking directory path "/home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms" ...
        QFactoryLoader::QFactoryLoader() looking at "/home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/libqxcb.so"
        Found metadata in lib /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/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/lib/qt/plugins/platforms" ...
        QFactoryLoader::QFactoryLoader() looking at "/usr/lib/qt/plugins/platforms/libqeglfs.so"
        Found metadata in lib /usr/lib/qt/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/qt/plugins/platforms/libqlinuxfb.so"
        Found metadata in lib /usr/lib/qt/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/qt/plugins/platforms/libqminimal.so"
        Found metadata in lib /usr/lib/qt/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/qt/plugins/platforms/libqminimalegl.so"
        Found metadata in lib /usr/lib/qt/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/qt/plugins/platforms/libqoffscreen.so"
        Found metadata in lib /usr/lib/qt/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/qt/plugins/platforms/libqvnc.so"
        Found metadata in lib /usr/lib/qt/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/qt/plugins/platforms/libqwayland-egl.so"
        Found metadata in lib /usr/lib/qt/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 "/usr/lib/qt/plugins/platforms/libqwayland-generic.so"
        Found metadata in lib /usr/lib/qt/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 "/usr/lib/qt/plugins/platforms/libqwayland-xcomposite-egl.so"
        Found metadata in lib /usr/lib/qt/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 "/usr/lib/qt/plugins/platforms/libqwayland-xcomposite-glx.so"
        Found metadata in lib /usr/lib/qt/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 "/usr/lib/qt/plugins/platforms/libqxcb.so"
        Found metadata in lib /usr/lib/qt/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 "/home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/libqxcb.so"
        QObject::moveToThread: Current thread (0x55871b6fa2c0) is not the object's thread (0x55871b6bee30).
        Cannot move to target thread (0x55871b6fa2c0)
        
        qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "/home/<username>/.local/lib/python3.9/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.
        
        JonBJ 1 Reply Last reply
        0
        • P Puddies

          Ok, I have found the xcb part. Maybe this helps a bit:

          QFactoryLoader::QFactoryLoader() checking directory path "/home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms" ...
          QFactoryLoader::QFactoryLoader() looking at "/home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/libqxcb.so"
          Found metadata in lib /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/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/lib/qt/plugins/platforms" ...
          QFactoryLoader::QFactoryLoader() looking at "/usr/lib/qt/plugins/platforms/libqeglfs.so"
          Found metadata in lib /usr/lib/qt/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/qt/plugins/platforms/libqlinuxfb.so"
          Found metadata in lib /usr/lib/qt/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/qt/plugins/platforms/libqminimal.so"
          Found metadata in lib /usr/lib/qt/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/qt/plugins/platforms/libqminimalegl.so"
          Found metadata in lib /usr/lib/qt/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/qt/plugins/platforms/libqoffscreen.so"
          Found metadata in lib /usr/lib/qt/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/qt/plugins/platforms/libqvnc.so"
          Found metadata in lib /usr/lib/qt/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/qt/plugins/platforms/libqwayland-egl.so"
          Found metadata in lib /usr/lib/qt/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 "/usr/lib/qt/plugins/platforms/libqwayland-generic.so"
          Found metadata in lib /usr/lib/qt/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 "/usr/lib/qt/plugins/platforms/libqwayland-xcomposite-egl.so"
          Found metadata in lib /usr/lib/qt/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 "/usr/lib/qt/plugins/platforms/libqwayland-xcomposite-glx.so"
          Found metadata in lib /usr/lib/qt/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 "/usr/lib/qt/plugins/platforms/libqxcb.so"
          Found metadata in lib /usr/lib/qt/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 "/home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/libqxcb.so"
          QObject::moveToThread: Current thread (0x55871b6fa2c0) is not the object's thread (0x55871b6bee30).
          Cannot move to target thread (0x55871b6fa2c0)
          
          qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "/home/<username>/.local/lib/python3.9/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.
          
          JonBJ Online
          JonBJ Online
          JonB
          wrote on last edited by
          #7

          @Puddies
          Try

          ldd /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/libqxcb.so
          

          Any "not found"s?

          P 1 Reply Last reply
          0
          • JonBJ JonB

            @Puddies
            Try

            ldd /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/libqxcb.so
            

            Any "not found"s?

            P Offline
            P Offline
            Puddies
            wrote on last edited by
            #8

            @JonB

            ldd: Warnung: Sie haben kein Ausführungsrecht für `/home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/libqxcb.so'
            	linux-vdso.so.1 (0x00007ffe5aac9000)
            	libQt5XcbQpa-70670cdb.so.5.15.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libQt5XcbQpa-70670cdb.so.5.15.0 (0x00007f53138ac000)
            	libfreetype-8d3bcff4.so.6.14.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libfreetype-8d3bcff4.so.6.14.0 (0x00007f53135dc000)
            	libz-d8a329de.so.1.2.7 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libz-d8a329de.so.1.2.7 (0x00007f53133c5000)
            	libQt5Gui-ca084835.so.5.15.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libQt5Gui-ca084835.so.5.15.0 (0x00007f5312a2e000)
            	libQt5Core-d92f2856.so.5.15.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libQt5Core-d92f2856.so.5.15.0 (0x00007f53122d4000)
            	libGL.so.1 => /usr/lib/libGL.so.1 (0x00007f531224e000)
            	libpthread.so.0 => /usr/lib/libpthread.so.0 (0x00007f531222d000)
            	libX11-xcb-1ae4fd0e.so.1.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libX11-xcb-1ae4fd0e.so.1.0.0 (0x00007f531202a000)
            	libxcb-icccm-413c9f41.so.4.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-icccm-413c9f41.so.4.0.0 (0x00007f5311e24000)
            	libxcb-image-e82a276d.so.0.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-image-e82a276d.so.0.0.0 (0x00007f5311c1a000)
            	libxcb-shm-7a199f70.so.0.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-shm-7a199f70.so.0.0.0 (0x00007f5311a14000)
            	libxcb-keysyms-21015570.so.1.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-keysyms-21015570.so.1.0.0 (0x00007f5311810000)
            	libxcb-randr-a96a5a87.so.0.1.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-randr-a96a5a87.so.0.1.0 (0x00007f53115f9000)
            	libxcb-render-util-43ce00f5.so.0.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-render-util-43ce00f5.so.0.0.0 (0x00007f53113f3000)
            	libxcb-render-637b984a.so.0.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-render-637b984a.so.0.0.0 (0x00007f53111dd000)
            	libxcb-shape-25c2b258.so.0.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-shape-25c2b258.so.0.0.0 (0x00007f5310fd7000)
            	libxcb-sync-89374f40.so.1.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-sync-89374f40.so.1.0.0 (0x00007f5310dce000)
            	libxcb-xfixes-9be3ba6f.so.0.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-xfixes-9be3ba6f.so.0.0.0 (0x00007f5310bc2000)
            	libxcb-xinerama-ae147f87.so.0.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-xinerama-ae147f87.so.0.0.0 (0x00007f53109bd000)
            	libxcb-xkb-9ba31ab3.so.1.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-xkb-9ba31ab3.so.1.0.0 (0x00007f5310794000)
            	libxcb.so.1 => /usr/lib/libxcb.so.1 (0x00007f531076a000)
            	libXext.so.6 => /usr/lib/libXext.so.6 (0x00007f5310755000)
            	libX11.so.6 => /usr/lib/libX11.so.6 (0x00007f5310614000)
            	libSM.so.6 => /usr/lib/libSM.so.6 (0x00007f531060a000)
            	libICE.so.6 => /usr/lib/libICE.so.6 (0x00007f53105ed000)
            	libxkbcommon-x11-c65ed502.so.0.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxkbcommon-x11-c65ed502.so.0.0.0 (0x00007f53103de000)
            	libxkbcommon-71ae2972.so.0.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxkbcommon-71ae2972.so.0.0.0 (0x00007f531019d000)
            	libdl.so.2 => /usr/lib/libdl.so.2 (0x00007f5310196000)
            	libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00007f530ff80000)
            	libm.so.6 => /usr/lib/libm.so.6 (0x00007f530fe3c000)
            	libgcc_s.so.1 => /usr/lib/libgcc_s.so.1 (0x00007f530fe21000)
            	libc.so.6 => /usr/lib/libc.so.6 (0x00007f530fc53000)
            	libgthread-2.0.so.0 => /usr/lib/libgthread-2.0.so.0 (0x00007f530fc4e000)
            	libglib-2.0.so.0 => /usr/lib/libglib-2.0.so.0 (0x00007f530fb19000)
            	libbz2-a273e504.so.1.0.6 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libbz2-a273e504.so.1.0.6 (0x00007f530f908000)
            	libpng15-c2ffaf3d.so.15.13.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libpng15-c2ffaf3d.so.15.13.0 (0x00007f530f6d9000)
            	/usr/lib64/ld-linux-x86-64.so.2 (0x00007f5313b5f000)
            	libGLdispatch.so.0 => /usr/lib/libGLdispatch.so.0 (0x00007f530f61f000)
            	libGLX.so.0 => /usr/lib/libGLX.so.0 (0x00007f530f5ec000)
            	libxcb-util-4d666913.so.1.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-util-4d666913.so.1.0.0 (0x00007f530f3e5000)
            	libXau-00ec42fe.so.6.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libXau-00ec42fe.so.6.0.0 (0x00007f530f1e0000)
            	libXau.so.6 => /usr/lib/libXau.so.6 (0x00007f530f1d9000)
            	libXdmcp.so.6 => /usr/lib/libXdmcp.so.6 (0x00007f530f1d1000)
            	libuuid.so.1 => /usr/lib/libuuid.so.1 (0x00007f530f1c8000)
            	libpcre.so.1 => /usr/lib/libpcre.so.1 (0x00007f530f156000)
            
            JonBJ Pl45m4P 2 Replies Last reply
            0
            • P Puddies

              @JonB

              ldd: Warnung: Sie haben kein Ausführungsrecht für `/home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/libqxcb.so'
              	linux-vdso.so.1 (0x00007ffe5aac9000)
              	libQt5XcbQpa-70670cdb.so.5.15.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libQt5XcbQpa-70670cdb.so.5.15.0 (0x00007f53138ac000)
              	libfreetype-8d3bcff4.so.6.14.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libfreetype-8d3bcff4.so.6.14.0 (0x00007f53135dc000)
              	libz-d8a329de.so.1.2.7 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libz-d8a329de.so.1.2.7 (0x00007f53133c5000)
              	libQt5Gui-ca084835.so.5.15.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libQt5Gui-ca084835.so.5.15.0 (0x00007f5312a2e000)
              	libQt5Core-d92f2856.so.5.15.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libQt5Core-d92f2856.so.5.15.0 (0x00007f53122d4000)
              	libGL.so.1 => /usr/lib/libGL.so.1 (0x00007f531224e000)
              	libpthread.so.0 => /usr/lib/libpthread.so.0 (0x00007f531222d000)
              	libX11-xcb-1ae4fd0e.so.1.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libX11-xcb-1ae4fd0e.so.1.0.0 (0x00007f531202a000)
              	libxcb-icccm-413c9f41.so.4.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-icccm-413c9f41.so.4.0.0 (0x00007f5311e24000)
              	libxcb-image-e82a276d.so.0.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-image-e82a276d.so.0.0.0 (0x00007f5311c1a000)
              	libxcb-shm-7a199f70.so.0.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-shm-7a199f70.so.0.0.0 (0x00007f5311a14000)
              	libxcb-keysyms-21015570.so.1.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-keysyms-21015570.so.1.0.0 (0x00007f5311810000)
              	libxcb-randr-a96a5a87.so.0.1.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-randr-a96a5a87.so.0.1.0 (0x00007f53115f9000)
              	libxcb-render-util-43ce00f5.so.0.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-render-util-43ce00f5.so.0.0.0 (0x00007f53113f3000)
              	libxcb-render-637b984a.so.0.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-render-637b984a.so.0.0.0 (0x00007f53111dd000)
              	libxcb-shape-25c2b258.so.0.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-shape-25c2b258.so.0.0.0 (0x00007f5310fd7000)
              	libxcb-sync-89374f40.so.1.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-sync-89374f40.so.1.0.0 (0x00007f5310dce000)
              	libxcb-xfixes-9be3ba6f.so.0.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-xfixes-9be3ba6f.so.0.0.0 (0x00007f5310bc2000)
              	libxcb-xinerama-ae147f87.so.0.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-xinerama-ae147f87.so.0.0.0 (0x00007f53109bd000)
              	libxcb-xkb-9ba31ab3.so.1.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-xkb-9ba31ab3.so.1.0.0 (0x00007f5310794000)
              	libxcb.so.1 => /usr/lib/libxcb.so.1 (0x00007f531076a000)
              	libXext.so.6 => /usr/lib/libXext.so.6 (0x00007f5310755000)
              	libX11.so.6 => /usr/lib/libX11.so.6 (0x00007f5310614000)
              	libSM.so.6 => /usr/lib/libSM.so.6 (0x00007f531060a000)
              	libICE.so.6 => /usr/lib/libICE.so.6 (0x00007f53105ed000)
              	libxkbcommon-x11-c65ed502.so.0.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxkbcommon-x11-c65ed502.so.0.0.0 (0x00007f53103de000)
              	libxkbcommon-71ae2972.so.0.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxkbcommon-71ae2972.so.0.0.0 (0x00007f531019d000)
              	libdl.so.2 => /usr/lib/libdl.so.2 (0x00007f5310196000)
              	libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00007f530ff80000)
              	libm.so.6 => /usr/lib/libm.so.6 (0x00007f530fe3c000)
              	libgcc_s.so.1 => /usr/lib/libgcc_s.so.1 (0x00007f530fe21000)
              	libc.so.6 => /usr/lib/libc.so.6 (0x00007f530fc53000)
              	libgthread-2.0.so.0 => /usr/lib/libgthread-2.0.so.0 (0x00007f530fc4e000)
              	libglib-2.0.so.0 => /usr/lib/libglib-2.0.so.0 (0x00007f530fb19000)
              	libbz2-a273e504.so.1.0.6 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libbz2-a273e504.so.1.0.6 (0x00007f530f908000)
              	libpng15-c2ffaf3d.so.15.13.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libpng15-c2ffaf3d.so.15.13.0 (0x00007f530f6d9000)
              	/usr/lib64/ld-linux-x86-64.so.2 (0x00007f5313b5f000)
              	libGLdispatch.so.0 => /usr/lib/libGLdispatch.so.0 (0x00007f530f61f000)
              	libGLX.so.0 => /usr/lib/libGLX.so.0 (0x00007f530f5ec000)
              	libxcb-util-4d666913.so.1.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-util-4d666913.so.1.0.0 (0x00007f530f3e5000)
              	libXau-00ec42fe.so.6.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libXau-00ec42fe.so.6.0.0 (0x00007f530f1e0000)
              	libXau.so.6 => /usr/lib/libXau.so.6 (0x00007f530f1d9000)
              	libXdmcp.so.6 => /usr/lib/libXdmcp.so.6 (0x00007f530f1d1000)
              	libuuid.so.1 => /usr/lib/libuuid.so.1 (0x00007f530f1c8000)
              	libpcre.so.1 => /usr/lib/libpcre.so.1 (0x00007f530f156000)
              
              JonBJ Online
              JonBJ Online
              JonB
              wrote on last edited by
              #9

              @Puddies said in qt.qpa.plugin: Could not load the Qt platform plugin "xcb":

              ldd: Warnung: Sie haben kein Ausführungsrecht für /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/libqxcb.so'`

              The dependencies look OK, but never seen this warning before. What does ls -l on it tell you?

              Having said that, it did report

              loaded library "/home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/libqxcb.so"
              

              I would be looking at the

              QObject::moveToThread: Current thread (0x55871b6fa2c0) is not the object's thread (0x55871b6bee30).
              Cannot move to target thread (0x55871b6fa2c0)
              

              You should not be getting this. Are you playing with threads somewhere?

              P 1 Reply Last reply
              0
              • P Puddies

                @JonB

                ldd: Warnung: Sie haben kein Ausführungsrecht für `/home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/libqxcb.so'
                	linux-vdso.so.1 (0x00007ffe5aac9000)
                	libQt5XcbQpa-70670cdb.so.5.15.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libQt5XcbQpa-70670cdb.so.5.15.0 (0x00007f53138ac000)
                	libfreetype-8d3bcff4.so.6.14.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libfreetype-8d3bcff4.so.6.14.0 (0x00007f53135dc000)
                	libz-d8a329de.so.1.2.7 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libz-d8a329de.so.1.2.7 (0x00007f53133c5000)
                	libQt5Gui-ca084835.so.5.15.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libQt5Gui-ca084835.so.5.15.0 (0x00007f5312a2e000)
                	libQt5Core-d92f2856.so.5.15.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libQt5Core-d92f2856.so.5.15.0 (0x00007f53122d4000)
                	libGL.so.1 => /usr/lib/libGL.so.1 (0x00007f531224e000)
                	libpthread.so.0 => /usr/lib/libpthread.so.0 (0x00007f531222d000)
                	libX11-xcb-1ae4fd0e.so.1.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libX11-xcb-1ae4fd0e.so.1.0.0 (0x00007f531202a000)
                	libxcb-icccm-413c9f41.so.4.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-icccm-413c9f41.so.4.0.0 (0x00007f5311e24000)
                	libxcb-image-e82a276d.so.0.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-image-e82a276d.so.0.0.0 (0x00007f5311c1a000)
                	libxcb-shm-7a199f70.so.0.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-shm-7a199f70.so.0.0.0 (0x00007f5311a14000)
                	libxcb-keysyms-21015570.so.1.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-keysyms-21015570.so.1.0.0 (0x00007f5311810000)
                	libxcb-randr-a96a5a87.so.0.1.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-randr-a96a5a87.so.0.1.0 (0x00007f53115f9000)
                	libxcb-render-util-43ce00f5.so.0.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-render-util-43ce00f5.so.0.0.0 (0x00007f53113f3000)
                	libxcb-render-637b984a.so.0.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-render-637b984a.so.0.0.0 (0x00007f53111dd000)
                	libxcb-shape-25c2b258.so.0.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-shape-25c2b258.so.0.0.0 (0x00007f5310fd7000)
                	libxcb-sync-89374f40.so.1.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-sync-89374f40.so.1.0.0 (0x00007f5310dce000)
                	libxcb-xfixes-9be3ba6f.so.0.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-xfixes-9be3ba6f.so.0.0.0 (0x00007f5310bc2000)
                	libxcb-xinerama-ae147f87.so.0.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-xinerama-ae147f87.so.0.0.0 (0x00007f53109bd000)
                	libxcb-xkb-9ba31ab3.so.1.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-xkb-9ba31ab3.so.1.0.0 (0x00007f5310794000)
                	libxcb.so.1 => /usr/lib/libxcb.so.1 (0x00007f531076a000)
                	libXext.so.6 => /usr/lib/libXext.so.6 (0x00007f5310755000)
                	libX11.so.6 => /usr/lib/libX11.so.6 (0x00007f5310614000)
                	libSM.so.6 => /usr/lib/libSM.so.6 (0x00007f531060a000)
                	libICE.so.6 => /usr/lib/libICE.so.6 (0x00007f53105ed000)
                	libxkbcommon-x11-c65ed502.so.0.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxkbcommon-x11-c65ed502.so.0.0.0 (0x00007f53103de000)
                	libxkbcommon-71ae2972.so.0.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxkbcommon-71ae2972.so.0.0.0 (0x00007f531019d000)
                	libdl.so.2 => /usr/lib/libdl.so.2 (0x00007f5310196000)
                	libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00007f530ff80000)
                	libm.so.6 => /usr/lib/libm.so.6 (0x00007f530fe3c000)
                	libgcc_s.so.1 => /usr/lib/libgcc_s.so.1 (0x00007f530fe21000)
                	libc.so.6 => /usr/lib/libc.so.6 (0x00007f530fc53000)
                	libgthread-2.0.so.0 => /usr/lib/libgthread-2.0.so.0 (0x00007f530fc4e000)
                	libglib-2.0.so.0 => /usr/lib/libglib-2.0.so.0 (0x00007f530fb19000)
                	libbz2-a273e504.so.1.0.6 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libbz2-a273e504.so.1.0.6 (0x00007f530f908000)
                	libpng15-c2ffaf3d.so.15.13.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libpng15-c2ffaf3d.so.15.13.0 (0x00007f530f6d9000)
                	/usr/lib64/ld-linux-x86-64.so.2 (0x00007f5313b5f000)
                	libGLdispatch.so.0 => /usr/lib/libGLdispatch.so.0 (0x00007f530f61f000)
                	libGLX.so.0 => /usr/lib/libGLX.so.0 (0x00007f530f5ec000)
                	libxcb-util-4d666913.so.1.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libxcb-util-4d666913.so.1.0.0 (0x00007f530f3e5000)
                	libXau-00ec42fe.so.6.0.0 => /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/../../../../opencv_python.libs/libXau-00ec42fe.so.6.0.0 (0x00007f530f1e0000)
                	libXau.so.6 => /usr/lib/libXau.so.6 (0x00007f530f1d9000)
                	libXdmcp.so.6 => /usr/lib/libXdmcp.so.6 (0x00007f530f1d1000)
                	libuuid.so.1 => /usr/lib/libuuid.so.1 (0x00007f530f1c8000)
                	libpcre.so.1 => /usr/lib/libpcre.so.1 (0x00007f530f156000)
                
                Pl45m4P Offline
                Pl45m4P Offline
                Pl45m4
                wrote on last edited by Pl45m4
                #10

                @Puddies said in qt.qpa.plugin: Could not load the Qt platform plugin "xcb":

                ldd: Warnung: Sie haben kein Ausführungsrecht für `/home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/libqxcb.so'

                Check your permissons on this directory. It expects execution permission. Seems strange.

                @JonB It says "ldd: warning: you do not have execution permission for...."


                If debugging is the process of removing software bugs, then programming must be the process of putting them in.

                ~E. W. Dijkstra

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                • JonBJ JonB

                  @Puddies said in qt.qpa.plugin: Could not load the Qt platform plugin "xcb":

                  ldd: Warnung: Sie haben kein Ausführungsrecht für /home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/libqxcb.so'`

                  The dependencies look OK, but never seen this warning before. What does ls -l on it tell you?

                  Having said that, it did report

                  loaded library "/home/<username>/.local/lib/python3.9/site-packages/cv2/qt/plugins/platforms/libqxcb.so"
                  

                  I would be looking at the

                  QObject::moveToThread: Current thread (0x55871b6fa2c0) is not the object's thread (0x55871b6bee30).
                  Cannot move to target thread (0x55871b6fa2c0)
                  

                  You should not be getting this. Are you playing with threads somewhere?

                  P Offline
                  P Offline
                  Puddies
                  wrote on last edited by Puddies
                  #11

                  @JonB
                  ls -l returns
                  -rw-r--r-- 1 <username> <group> 104K 10. Jun 13:34 libqxcb.so

                  I set execution permissions and the warning disappeared. However, this did not resolve the crash of my application.

                  I dont use any threads in my code. However, I dont also use QT directly, I use matplotlib for the gui (which uses qt).
                  But I did not explicitely use threads here.

                  JonBJ 1 Reply Last reply
                  1
                  • P Puddies

                    @JonB
                    ls -l returns
                    -rw-r--r-- 1 <username> <group> 104K 10. Jun 13:34 libqxcb.so

                    I set execution permissions and the warning disappeared. However, this did not resolve the crash of my application.

                    I dont use any threads in my code. However, I dont also use QT directly, I use matplotlib for the gui (which uses qt).
                    But I did not explicitely use threads here.

                    JonBJ Online
                    JonBJ Online
                    JonB
                    wrote on last edited by
                    #12

                    @Puddies
                    Normally under Linux .so files are marked executable, so would be -rwxr-xr-x. That will be the cause of the warning message. But it doesn't actually matter, since it says it loaded it.

                    I still think you have a threading issue as per the message, I don't know if that is what is causing your problem.

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                    • JonBJ Online
                      JonBJ Online
                      JonB
                      wrote on last edited by
                      #13

                      Thread https://forum.qt.io/topic/127832/pyqt5-and-tensorflowlite-causes-crashes/3 shows exactly the same output and issue. If someone can answer one it answers the other....

                      1 Reply Last reply
                      1
                      • B Offline
                        B Offline
                        bimhox
                        wrote on last edited by
                        #14

                        Was someone successful in fixing it? worst case scenario, should we disintall and reinstall what application? qt ? cv2? python?

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                        0
                        • J Offline
                          J Offline
                          jerryhon
                          wrote on last edited by jerryhon
                          #15
                          This post is deleted!
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