Bug 493458 - Single pixel translucent line appears under application title bar when maximized and using specific fractional scaling settings
Summary: Single pixel translucent line appears under application title bar when maximi...
Status: RESOLVED DUPLICATE of bug 483338
Alias: None
Product: kwin
Classification: Plasma
Component: decorations (show other bugs)
Version: 6.1.5
Platform: Arch Linux Linux
: NOR normal
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2024-09-21 23:00 UTC by kaloyan.ignatov
Modified: 2024-09-25 15:30 UTC (History)
4 users (show)

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Description kaloyan.ignatov 2024-09-21 23:00:22 UTC 
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%).
Comment 1 Zamundaaa 2024-09-25 15:30:01 UTC 
*** This bug has been marked as a duplicate of bug 483338 ***