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QXcbConnection: XCB error: 8 (BadMatch)

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  • gde23G Offline
    gde23G Offline
    gde23
    wrote on last edited by
    #1

    Hello,

    i have compiled my project on a machine running Debian Stretch and out of a sudden get many of these errors:

    QXcbConnection: XCB error: 8 (BadMatch), sequence: 2409, resource id: 117440720, major code: 130 (Unknown), minor code: 3
    QXcbConnection: XCB error: 8 (BadMatch), sequence: 2429, resource id: 117440720, major code: 130 (Unknown), minor code: 3
    QXcbConnection: XCB error: 8 (BadMatch), sequence: 2432, resource id: 117440720, major code: 130 (Unknown), minor code: 3
    

    What is this? (it doesn't seem to cause any problems, but still it can't be good to ignore it)
    On Windows 7 as well as on another machine running Kubuntu they don't appear.

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

      Hi,

      Are you running your OS on a physical machine or a virtual machine ?

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

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      • gde23G Offline
        gde23G Offline
        gde23
        wrote on last edited by gde23
        #3

        Hi,
        it's a physical maschine

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

          What desktop environment are you using ?
          What window manager ?

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

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          • gde23G Offline
            gde23G Offline
            gde23
            wrote on last edited by
            #5

            Hi,

            the desktop environment is KDE with kwin as window manager.
            KDE version is 5:92
            kwin version is 4:5.8.6-1

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

              Are you using the distribution provided Qt ?

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

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              • gde23G Offline
                gde23G Offline
                gde23
                wrote on last edited by gde23
                #7

                @SGaist yes its the distribution Qt version.

                i'm not sure if it has something to do with this, but i noticed, that i get some compiler warning about VTK:
                VTK version is VTK-8.1.0

                warning: 'QVTKWidget::QVTKWidget(QWidget*, Qt::WindowFlags)' is deprecated [-Wdeprecated-declarations]
                

                or maybe you can tell me what the error means because i have absolutely no idea where to search for

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                • SGaistS Offline
                  SGaistS Offline
                  SGaist
                  Lifetime Qt Champion
                  wrote on last edited by
                  #8

                  That's not an error, it's just a warning that you are using a method that is considered deprecated and you should consider updating your code.

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

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