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  1. Qt
  2. QTBUG-99577

Some signals emitted double times of vsync on Jetson Tx2

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    • Linux/Yocto

    Description

      With the attached sample program using Qt3D and counting FPS based on QQuickWindow::frameSwapped() signal, it is showing below results when connected the same display with 60Hz refresh rate.

      Qt 5.12.12: 60 fps (OpenGL ES 3.2 NVIDIA L4T 28.2.1)
      Qt 5.15.6: 120 fps (OpenGL ES 3.2 NVIDIA L4T 32.3.1)
      Qt 5.15.8: 120 fps (OpenGL ES 3.2 NVIDIA L4T 32.6.1)
      Qt 6.2.3: 120 fps (OpenGL ES 3.2 NVIDIA L4T 32.5.2)

      The same symptom also observed with QQuickWindow::beforeRendering signal.

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            janichol Andy Nichols
            yifei Yi Fei (Inactive)
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              Created:
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              Resolved:

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