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Qt5 QML App not visible when change the resolution ?

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  • D Devopia53

    @Alex_wang

    Yes, of course. Read the following document.

    QScreen
    Screen

    like this:

    #include <QScreen>
    [...]
    QScreen     *screen = QApplication::primaryScreen();
    QObject::connect(screen, &QScreen::geometryChanged, [](const QRect &geometry){ qDebug() << geometry; });
    [...]
    
    A Offline
    A Offline
    Alex_wang
    wrote on last edited by
    #7

    @Devopia53 said in Qt5 QML App not visible when change the resolution ?:

    QObject::connect(screen, &QScreen::geometryChanged, [](const QRect &geometry){ qDebug() << geometry; });

    Hi, it is not helpful for me.

    when I change the resolution, the screen (QApplication::primaryScreen()) is not changed....

    jsulmJ 1 Reply Last reply
    0
    • A Alex_wang

      @Devopia53 said in Qt5 QML App not visible when change the resolution ?:

      QObject::connect(screen, &QScreen::geometryChanged, [](const QRect &geometry){ qDebug() << geometry; });

      Hi, it is not helpful for me.

      when I change the resolution, the screen (QApplication::primaryScreen()) is not changed....

      jsulmJ Offline
      jsulmJ Offline
      jsulm
      Lifetime Qt Champion
      wrote on last edited by
      #8

      @Alex_wang Do you mean the QScreen::geometryChanged signal is not emitted?

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

      1 Reply Last reply
      0
      • SGaistS Offline
        SGaistS Offline
        SGaist
        Lifetime Qt Champion
        wrote on last edited by
        #9

        By the way, how are you changing the resolution ?

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

        A 1 Reply Last reply
        0
        • SGaistS SGaist

          By the way, how are you changing the resolution ?

          A Offline
          A Offline
          Alex_wang
          wrote on last edited by
          #10

          @SGaist
          change the resolution by an app "drm_modeset":

          sudo ./drm_modeset -s 1920x1080@60
          
          A 1 Reply Last reply
          0
          • A Alex_wang

            @SGaist
            change the resolution by an app "drm_modeset":

            sudo ./drm_modeset -s 1920x1080@60
            
            A Offline
            A Offline
            Alex_wang
            wrote on last edited by
            #11

            after changed the resolution, the surface or screen or window for qt5 app is still depending on last resolution.
            the reason is on four floor

            1 Reply Last reply
            0
            • SGaistS Offline
              SGaistS Offline
              SGaist
              Lifetime Qt Champion
              wrote on last edited by
              #12

              See here and the QT_QPA_EGLFS_ALWAYS_SET_MODE environment variable.

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

              A 1 Reply Last reply
              0
              • SGaistS SGaist

                See here and the QT_QPA_EGLFS_ALWAYS_SET_MODE environment variable.

                A Offline
                A Offline
                Alex_wang
                wrote on last edited by
                #13

                @SGaist
                I have got it . It means I still have to relaunch the application.

                1 Reply Last reply
                0
                • SGaistS Offline
                  SGaistS Offline
                  SGaist
                  Lifetime Qt Champion
                  wrote on last edited by
                  #14

                  Do you have any other application running on your system ?

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

                  A 1 Reply Last reply
                  0
                  • SGaistS SGaist

                    Do you have any other application running on your system ?

                    A Offline
                    A Offline
                    Alex_wang
                    wrote on last edited by
                    #15

                    @SGaist
                    The decoded video is also rendered by DRM, which is running on my system.

                    M 1 Reply Last reply
                    0
                    • SGaistS Offline
                      SGaistS Offline
                      SGaist
                      Lifetime Qt Champion
                      wrote on last edited by
                      #16

                      You have to give more details about your system and what it does.

                      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
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                      • A Alex_wang

                        @SGaist
                        The decoded video is also rendered by DRM, which is running on my system.

                        M Offline
                        M Offline
                        Michael Chen
                        wrote on last edited by
                        #17

                        @Alex_wang
                        Have you found a solution? I'm also having the same problem.

                        1 Reply Last reply
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