https://bugs.kde.org/show_bug.cgi?id=513296
Bug ID: 513296
Summary: The default value of KWIN_DRM_OVERRIDE_SAFETY_MARGIN
is not suitable for high refresh rate screens
Classification: Plasma
Product: kwin
Version First 6.5.4
Reported In:
Platform: Arch Linux
OS: Linux
Status: REPORTED
Keywords: efficiency-and-performance, wayland-only
Severity: normal
Priority: NOR
Component: performance
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
By default the environment variable KWIN_DRM_OVERRIDE_SAFETY_MARGIN is set to
1500, but with this value on my 360Hz monitor, I have frame drops in graphical
applications such as Firefox and games. Lowering it to 500 solves the issue for
me.
STEPS TO REPRODUCE
1. Keep KWIN_DRM_OVERRIDE_SAFETY_MARGIN at the default value (1500).
2. Open vkcube on a 240 or 360Hz monitor.
3. Show the FPS with mangohud.
OBSERVED RESULT
Periodic stutters.
EXPECTED RESULT
Frame time should be flat
SOFTWARE/OS VERSIONS
Linux: 6.17.9-arch1-1
KDE Plasma Version: 6.5.4
KDE Frameworks Version: 6.20.0
Qt Version: 6.10.1
ADDITIONAL INFORMATION
The safety margin should depends on the monitor refresh rate.
--
You are receiving this mail because:
You are watching all bug changes.
