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  1. Qt
  2. QTBUG-138640

GUI event loop starvation in Wayland clients with slow QtQuick rendering

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      Adding a delay in rendering causes timers to be significantly delayed when running on Wayland. This does not happen on X11. Also, it does not happen when using QSG_RENDER_LOOP=basic on wayland.

      The attached example adds a selectable delay to the Quick render loop, and prints the actual interval for a 100 ms timer. Adding just a 30 ms delay causes the timer to fire at ~400 ms intervals, while rendering still happens at 30 FPS. 

        1. qtbug138640.tar.gz
          2 kB
        2. slowrender.tar.gz
          2 kB
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            qt.team.graphics.and.multimedia Qt Graphics Team
            tvete Paul Olav Tvete
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