https://bugs.kde.org/show_bug.cgi?id=448473
Bug ID: 448473
Summary: Frame rate varies between 28 and 48 while a maximized
window is focused
Product: kwin
Version: 5.23.90
Platform: Archlinux Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
SUMMARY
According to 'Show fps' effect enabled in 'Desktop Effects' KCM, when my
desktop is focused, frame rate is 58.
However, when System Settings is maximized and focused, frame rate is 48, and
when Konsole is maximized and focused, frame rate is 28. Furthermore, mouse
pointer movement feels laggy. Tried all 'Latency' settings available in
Compositor KCM, but nothing changes.
STEPS TO REPRODUCE
1. use Wayland session
2. enable 'Show fps' effect in Desktop Effects KCM
3. observe the frame rate while your desktop is focused, maximized Konsole is
focused, maximized System Settings is focused
OBSERVED RESULT
frame rate is lower than normal, laggy mouse pointer movement
EXPECTED RESULT
in my case, constant 60 fps (refresh rate is 60 Hz in Display Configuration
KCM)
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.23.90
KDE Frameworks Version: 5.90.0
Qt Version: 5.15.2
Kernel Version: 5.16.0-arch1-1 (64-bit)
Graphics Platform: Wayland
Processors: 2 × Intel® Celeron® CPU G1820 @ 2.70GHz
Memory: 7,6 GiB of RAM
Graphics Processor: Mesa DRI Intel® HD Graphics
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