https://bugs.kde.org/show_bug.cgi?id=398391
Bug ID: 398391
Summary: Stuttering mouse in high DPI XWayland games on Wayland
Product: kwin
Version: git master
Platform: Archlinux Packages
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: input
Assignee: kwin-bugs-n...@kde.org
Reporter: m...@rainer-finke.de
Target Milestone: ---
Multiple XWayland games in high resolutions (4k) suffer from a stuttering or
lagging mouse on Wayland. This issue exists in OpenTTD and in multiple
proprietary games, it is not 100% consistent in all test, but I think in
OpenTTD it is obvious. I have the feeling it is related to a threading issue,
changing the power governor of the CPU somehow seems to reduce the issue
(tested with LD_PRELOAD=$LD_PRELOAD:/usr/\$LIB/libgamemodeauto.so openttd).
Tested with Kwin-git and kwayland-git on Arch Linux
Plasma 5.13.5
KDE Frameworks 5.49
Qt 5.11.1
XWayland 1.20.1
libinput 1.11.3
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