https://bugs.kde.org/show_bug.cgi?id=507002
Bug ID: 507002
Summary: Desktop renders at low framerate when VRR is enabled
Classification: Plasma
Product: kwin
Version First 6.4.1
Reported In:
Platform: openSUSE
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: kwin-bugs-n...@kde.org
Reporter: mor...@pc-heini.de
Target Milestone: ---
Created attachment 183208
--> https://bugs.kde.org/attachment.cgi?id=183208&action=edit
Video of the build in framerate indicator of my monitor
SUMMARY
My monitor supports 175Hz with FreeSync Premium.
When VRR is enabled and the system doesn't display dynamic content, the
framerate reduces automatically, which is fine. In my case, it runs at 48 fps
until I interact with the system. Ever since I updated my system from Plasma
6.3 to 6.4.2, the framerate stays at 48, even when the cursor is moved, making
it feel very laggy.
STEPS TO REPRODUCE
1. enable VRR
2. move cursor
OBSERVED RESULT
Cursor visibly laggy and not taking advantage of high refresh rate screen.
EXPECTED RESULT
Framerate increases to match the displays max VRR framerate.
SOFTWARE/OS VERSIONS
Linux Kernel: 6.15.4
KDE Plasma Version: 6.4.2
KDE Frameworks Version: 6.15.0
Qt Version: 6.9.1
ADDITIONAL INFORMATION
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