https://bugs.kde.org/show_bug.cgi?id=425192
Bug ID: 425192
Summary: Screens overlap on Wayland when scaling is fractional
Product: KScreen
Version: 5.18.4
Platform: Ubuntu Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: common
Assignee: kscreen-bugs-n...@kde.org
Reporter: kirill.bogdane...@gmail.com
Target Milestone: ---
SUMMARY
I have a dual-monitor setup: a 4K (3840x2160) laptop 15.6" screen and a
1920x1200 external 24" monitor (Dell U2413).
Here is kscreen-console dump: https://invent.kde.org/snippets/1098
STEPS TO REPRODUCE
1. Log in to Wayland session
2. Set scaling to be fractional (e.g. 195% = 1.95) on one monitor
3. Connect external screen (leave it at 100% scaling)
OBSERVED RESULT
There is a slight overlapping of displays. E.g. when a window is moved to the
side of the screen, which is adjacent to the other screen, a few pixels of the
window (close to the screen edge) are also duplicated on the other screen. I.e.
I can see the same pixels drawn twice.
And this cannot be remedied by moving display arrangement in the System
Settings: as long as displays are adjacent there is the overlap.
EXPECTED RESULT
The displays should not overlap no matter the scaling.
SOFTWARE/OS VERSIONS
Linux: Kubuntu 20.04
KDE Plasma Version: 5.18.5
KDE Frameworks Version: 5.68.0
Qt Version: 5.12.8
ADDITIONAL INFORMATION
This only happens on Wayland session.
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