https://bugs.kde.org/show_bug.cgi?id=456997

--- Comment #4 from Zamundaaa <[email protected]> ---
Seems like from KWin's perspective nothing is wrong or out of the ordinary. We
can get more information if you execute
> echo 0x1FF | sudo tee /sys/module/drm/parameters/debug
to enable drm debug logging and then
> sudo dmesg -w > drm-debug.log
(leave that running), reproduce the bug again, cancel the dmesg command and
upload the log it produces.

As this also sounds like it might be related to direct scanout, does putting
> KWIN_DRM_NO_DIRECT_SCANOUT=1
into /etc/environment and rebooting resolve the problem?

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