https://bugs.kde.org/show_bug.cgi?id=472066
Bug ID: 472066
Summary: Frames dropped and heavy stuttering when compositing
enabled
Classification: Plasma
Product: kwin
Version: git-stable-Plasma/5.27
Platform: Archlinux
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: general
Assignee: kwin-bugs-n...@kde.org
Reporter: herrcr...@gmail.com
Target Milestone: ---
Created attachment 160164
--> https://bugs.kde.org/attachment.cgi?id=160164&action=edit
system specs (inxi)
Aloha !
KWin appears to cause dropped frames and heavy stuttering in games or graphical
applications such as video players, OBS, Blender, etc, whenever compositing is
enabled. This behavior disappears when compositing is disabled.
Games ran while compositing is enabled suffer from a significant drop in FPS
and heavy stuttering. Movements appears not smooth, as if every few frames were
dropped or swapped. This is also visible by using gltest
(https://git.ralfj.de/gltest.git), altho the system needs to be somewhat loaded
to really exhibit the issue.
I have tried disabling KWin's vsync by setting the following :
KWIN_X11_REFRESH_RATE=144000
KWIN_X11_NO_SYNC_TO_VBLANK=1
KWIN_X11_FORCE_SOFTWARE_VSYNC=1
This, however, did not solve the problem.
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