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  1. Qt
  2. QTBUG-45959

QtQuick Animation timing too fast on Linux nvidia optimus systems

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      This is a bug report resulting from https://bugs.kde.org/show_bug.cgi?id=347237

      On Linux systems using a nvidia optimus setup with PRIME, QtQuick's animations play back way too fast, as if they somehow used a wrong estimate for the refresh rate. This leads to sped-up animations and excessive CPU usage.

      A minimal test case can be found here: https://github.com/CounterPillow/spinnertest

      This may be related to nvidia not having implemented PRIME fencing at the moment, see https://devtalk.nvidia.com/default/topic/775691/linux/vsync-issue-nvidia-prime-ux32vd-with-gt620-m-/post/4430873/#4430873

        1. gottagofast_c.mkv
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            lagocs Laszlo Agocs
            fratti Nicolas Frattaroli
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