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  1. Qt
  2. QTBUG-37271

OSX: Full screen OpenGL application is causing high CPU Wait for GPU

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    • macOS

      When running the attached example application with the native screen resolution e.g 2560x1440 will cause very high CPU Wait for GPU number (~95%). You can see that with the OpenGL Driver Monitor tool.

      If the resolution is something else e.g. 2560x1441 the CPU Wait for GPU will drop close to 0%.

      To reproduce the issue more easily a secondary monitor must be connected.

        1. fullscreendisplaylink.tar.gz
          15 kB
        2. openglwindow.tar.gz
          4 kB
        3. qtfullscreendisplaylink.tar.gz
          4 kB
        4. Resolution 1439x900.png
          Resolution 1439x900.png
          251 kB
        5. Resolution 1440x900.png
          Resolution 1440x900.png
          242 kB
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            lagocs Laszlo Agocs
            kileppal Kimmo Leppälä
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              Created:
              Updated:
              Resolved:

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