https://bugs.kde.org/show_bug.cgi?id=493458
Bug ID: 493458
Summary: Single pixel translucent line appears under
application title bar when maximized and using
specific fractional scaling settings
Classification: Plasma
Product: kwin
Version: 6.1.5
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: decorations
Assignee: kwin-bugs-n...@kde.org
Reporter: kaloyan.igna...@outlook.com
Target Milestone: ---
SUMMARY
Single pixel translucent line appears under application title bar when
maximized and using specific fractional scaling settings.
STEPS TO REPRODUCE
1. Set scaling to 120% (or 110%, 135% and several others).
2. Open Dolphin File Manager.
3. Maximize app (having a light desktop background helps in seeing the line).
OBSERVED RESULT
A transparent line appears just bellow the title bar and above the window
contents.
https://pasteboard.co/PYhEeAF4VfzA.png
The line appears white due to the background behind the window being completely
white.
EXPECTED RESULT
No transparent line should appear in that position.
https://pasteboard.co/sYSF4nPiBsWC.png
SOFTWARE/OS VERSIONS
KDE Plasma Version: 6.1.5
KDE Frameworks Version: 6.6.0
Qt Version: 6.7.2
Graphics Platform: Wayland
ADDITIONAL INFORMATION
The defect appears on a 14" notebook screen with a resolution of 1080p and is
observable under Wayland. It is alleviated by applying a scaling factor that is
not affect (e.g. 115%).
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