https://bugs.kde.org/show_bug.cgi?id=410178
Bug ID: 410178
Summary: Screen framerate doesn't change with refresh rate
changes
Product: kwin
Version: 5.16.3
Platform: Archlinux Packages
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: core
Assignee: kwin-bugs-n...@kde.org
Reporter: kailash.sudha...@gmail.com
Target Milestone: ---
Created attachment 121710
--> https://bugs.kde.org/attachment.cgi?id=121710&action=edit
Attached screenshot as proof
SUMMARY
I use a custom EDID file to set custom refresh rates for my laptop display. The
refresh rates show up correctly on the Display & Monitor (kscreen) settings
module but setting the preferred value changes only the refresh rate but not
the frame rate. I've even tried setting MaxFPS=100 (matching my refresh rate)
in kwinrc but it hasn't helped. But doing the same when the the preferred
refresh rate is the first value in the EDID file (priority wise), I am able to
use kwin at 100hz with 100 FPS but FPS remains at 100 even on switching to
60hz.
STEPS TO REPRODUCE
1. Open System Settings > Display & Monitor
2. Change Refresh Rate
3. Check Screen FPS on the Show FPS Desktop Effect
OBSERVED RESULT
Refresh rate has been set to the correct value as evident from running `xrandr
-q`. But screen FPS is unchanged (remains at 60).
EXPECTED RESULT
Frame rate is supposed to change along with refresh rate.
SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux/KDE Plasma: Arch Linux/5.16.3
(available in About System)
KDE Plasma Version: 5.16.3
KDE Frameworks Version: 5.60.0
Qt Version: 5.13.0
ADDITIONAL INFORMATION
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