https://bugs.kde.org/show_bug.cgi?id=414245
Bug ID: 414245
Summary: Missing configurations in KWin to prevent shutter and
lag.
Product: kwin
Version: 5.16.5
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: grave
Priority: NOR
Component: compositing
Assignee: kwin-bugs-n...@kde.org
Reporter: well_na...@hotmail.com
Target Milestone: ---
SUMMARY
There are two missing options in the KWin compositor to prevent lag and shutter
in fullscreen games without to disable de compositor.
Options ..
1) Sync to VBlank (Only perform screen updates during vertical blanking period)
2) Unredirect Fullscreen Windows (Allow drawing of fullscreen windows to not be
redirected to offscreen pixmaps)
EXPECTED RESULT
Able to play games with compositor ON and without shutter and more fps.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Fedora 31/Plasma 5.16.5
(available in About System)
KDE Plasma Version: 5.16.5
KDE Frameworks Version: 5.61
Qt Version: 5.12.5
ADDITIONAL INFORMATION
It appears that when you are using compositor, Nvidia X Server settings' Vblank
option does not work. If you are using compositor then select the sync to
VBlank can help fix this issue. VBlank is useful for watching videos and
playing games "screen tearing" which is horizontal lines occasionally
distorting videos. Enabling Sync to VBlank will usually fix the screen tearing
issues.
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