https://bugs.kde.org/show_bug.cgi?id=500219

--- Comment #6 from Zamundaaa <xaver.h...@gmail.com> ---
My tool to look at that data says 67% of frames are dropped on DP-2, and 100%
on HDMI-A-3. In both cases, the very vast majority because of commits being too
late.
That means KWin seems to be doing everything correctly, and the kernel is just
too late.

There is a second possible cause, which we've hit with Intel GPUs before. If
you set
https://invent.kde.org/plasma/kwin/-/wikis/Environment-Variables#kwin_drm_disable_buffer_readability_checks
to 1, does that change anything?

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