https://bugs.kde.org/show_bug.cgi?id=484000
Bug ID: 484000
Summary: When running apps in fullscreen or maximized with
fractional scaling enabled and the panel in floating
mode, on certain screen resolutions a sliver of the
desktop's wallpaper can be seen at the bottom right of
the screen
Classification: Plasma
Product: plasmashell
Version: 6.0.2
Platform: openSUSE
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Panel
Assignee: plasma-b...@kde.org
Reporter: alexander.sander...@outlook.com
CC: niccolo.venera...@gmail.com
Target Milestone: 1.0
Created attachment 167472
--> https://bugs.kde.org/attachment.cgi?id=167472&action=edit
Example of this bug in a maximized app
SUMMARY
Whenever the floating panel "de-floats" while running on a screen resolution of
2256x1504 with 150% fractional scaling, a small sliver of the desktop's
wallpaper can be seen at the bottom right of the display. This can be
especially distracting in fullscreen apps, such as games or letterboxed video.
STEPS TO REPRODUCE
1. Set screen resolution to 2256x1504 (if possible. I'm not sure if this can be
done in a VM, in which case try using a Framework Laptop or Microsoft Surface
Laptop)
2. Set scale factor to 150%
3. Restart KDE Plasma (for good measure)
4. Run an app maximized or in fullscreen (for instance, Firefox or a Steam
game)
OBSERVED RESULT
A small sliver of the desktop wallpaper can be seen of the bottom right of the
screen
EXPECTED RESULT
The panel defloats without showing any of the wallpaper
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: openSUSE Tumbleweed 20240317
(available in About System)
KDE Plasma Version: 6.0.2
KDE Frameworks Version: 6.0.0
Qt Version: 6.6.2
ADDITIONAL INFORMATION
Strangely I notice this only seems to happen under the following conditions
(though there may be more):
1. An app is fullscreened. The reason why this is odd is because if you don't
open any fullscreen apps, maximized windows will actually display properly. But
after one fullscreen window has been opened (and later closed, doesn't matter),
maximized windows have this effect.
2. Displays are switched.
Also, this actually even affects the screen locker, which is slightly funny,
but I guess it kinda makes sense?
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