https://bugs.kde.org/show_bug.cgi?id=487902
Bug ID: 487902
Summary: corruption in bottom part of non-floating panel under
Wayland with fractional scaling when floating would
occur
Classification: Plasma
Product: kwin
Version: 6.0.5
Platform: openSUSE
OS: Linux
Status: REPORTED
Severity: minor
Priority: NOR
Component: platform-wayland-nested
Assignee: kwin-bugs-n...@kde.org
Reporter: justintwayl...@gmail.com
Target Milestone: ---
Created attachment 170055
--> https://bugs.kde.org/attachment.cgi?id=170055&action=edit
Shows the center of a panel. Corrupted pixels can be seen beneath.
Different from bug #482987 because it is less reliable in showing up and
disappears when using floating panels or using a maximized window
SUMMARY
Non-floating panels sometimes have their bottom row of pixels corrupted when a
maximized window does not exist. This in general seems to overlap with when KDE
would decide to make the panel float if floating were set.
STEPS TO REPRODUCE
1. Log in to KDE. Make sure the bottom panel is **not** a floating panel.
2. Open up Firefox. Maximize the window.
3. Repeatedly minimize and maximize the window.
OBSERVED RESULT
A row of corrupted pixels sometimes shows up at the bottom of the panel.
EXPECTED RESULT
Pixels should never be corrupted by repeated minimizing and maximizing.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 6.9.1-1-default
(available in About System)
KDE Plasma Version: 6.0.5
KDE Frameworks Version: 6.2.0
Qt Version: 6.7.0
ADDITIONAL INFORMATION
This only occurs when fractional scaling is used.
This only occurs under Wayland; X11 has so far had no problems with this.
This can be worked around by setting the panel to be floating.
Given that this occurs only when floating would occur, this may be related to
floating panel functionality being wrongly called on non-floating panels.
If further images are needed for added context, let me know! It's pretty easy
to reproduce this bug and takes less than a minute to trigger.
HARDWARE INFO
Processors: 16 × AMD Ryzen 7 7840HS w/ Radeon 780M Graphics
Memory: 14.9 GiB of RAM
Graphics Processor: AMD Radeon Graphics
Manufacturer: Framework
Product Name: Laptop 16 (AMD Ryzen 7040 Series)
System Version: A7
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