https://bugs.kde.org/show_bug.cgi?id=487082
Bug ID: 487082
Summary: Not all screens update on window re-paints when using
Zoom effect on Wayland
Classification: Plasma
Product: kwin
Version: 6.0.4
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: alkalinethun...@gmail.com
Target Milestone: ---
SUMMARY
When using multiple displays with the Zoom effect on Wayland, not all screens
update when a window needs to re-paint. This is most notable when typing in a
text field, and appeasrs as if keys are being dropped.
STEPS TO REPRODUCE
1. Plug two or more displays into your system
2. Open Konsole on display 1
3. Zoom in to display 1, and type into Konsole until the cursor reaches display
2.
4. Continue typing, slowly, and observe keystrokes appearing to be dropped.
5. When you see that, either wait a bit or move your mouse. Notice the
"dropped" key was never dropped, the display was just never repainted on time
so you never saw it.
6. Repeat steps 5, swapping ddisplay 1 with display 2.
OBSERVED RESULT
If the user has more than one display, and is zoomed in, un-focused displays
appear to update less frequently even though they need to. Unfocused displays
being displays other than the one on which the currently focused window is
placed when zoomed out.
The animation of zooming in and out of the screen isn't affected by this.
Toggling color inversion does get affected, one screen will occasionally appear
un-inverted when the other is inverted. The Window verview animation doesn't
cause this, but the Tiling Editor one does (more noticeable on my system when
closing tiling editor.)
EXPECTED RESULT
All displays on which re-painting windows are visible should be re-painted at
the same time so as to not cause them to go out-of-sync with each other.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux 6.8.9-arch1-2 (64-bit)
KDE Plasma Version: 6.0.4
KDE Frameworks Version: 6.2.0
Qt Version: 6.7.0
ADDITIONAL INFORMATION
Both my screens are on the same GPU
GPU: AMD RX 7600XT
Screen 1: 32" 3840x2160, HDMI, 60Hz, no variable refresh rate
Screen 2: 32" 3840x2160, DisplayPort, 60Hz, no variable refresh rate
Both screens are at 100% display scale
This bug does not affect X11.
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