https://bugs.kde.org/show_bug.cgi?id=475757
Bug ID: 475757
Summary: Weird scaling behaviour on integrated screen when
changing resolutions (Wayland)
Classification: Plasma
Product: kwin
Version: git master
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: platform-drm
Assignee: kwin-bugs-n...@kde.org
Reporter: uhh...@gmail.com
Target Milestone: ---
SUMMARY
When changing the resolution of my laptop's integrated screen, it takes an
indeterminate while for the screen to start rescaling to what Kwin is
outputting, as if it's waiting for some condition to trigger an update.
Sleeping and restoring the system does not trigger this update.
Touch always rescales immediately without any delay.
STEPS TO REPRODUCE
1. Change resolution downwards
2. Notice the new output is stuck in the top of the hardware display without
being rescaled
3. ???
4. Something happens and the system starts scaling output to fit the display
5. Change resolution back upwards
6. Notice only the top left of the output is being output to the hardware
display; as if it is still using the scale of the previous resolution
7. ????
8. Something happens and thesystem starts scaling output to fit the display
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