https://bugs.kde.org/show_bug.cgi?id=517676
Bug ID: 517676
Summary: Screen content flickers when switching desktops slowly
and manually
Classification: Plasma
Product: kwin
Version First 6.6.2
Reported In:
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: compositing
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
SUMMARY
When sliding through desktops manually (e.g. with a touchpad), the screen
content flickers/flashers as the transition progresses, making it a headache to
look at for too long.
First hypothesis: the movement isn't performed cleanly pixel by pixel, so
in-between pixels get blended and the content flashes when the contrast is too
high.
STEPS TO REPRODUCE
1. Manually slide with 3 fingers slowly to switch desktops, do it slowly so
it's easier to notice
OBSERVED RESULT
In-between pixels blend in the grid, making the contents flash for non-integer
movement.
EXPECTED RESULT
The desktop switch/screen scrolling should be done with integer movements (e.g.
no half-pixel scroll, only one by one) to eliminate the blendings, no matter
what the scale factor is.
SOFTWARE/OS VERSIONS
Windows:
macOS:
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma: Arch Linux
KDE Plasma Version: 6.6.2
KDE Frameworks Version: 6.23.0
Qt Version: 6.10.2
ADDITIONAL INFORMATION
Display: 2560x1440 @ 165 Hz + VRR, 150% scale factor
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