https://bugs.kde.org/show_bug.cgi?id=488492
Bug ID: 488492
Summary: Panel and windows constantly flicker when using a
specific tinted color scheme
Classification: Plasma
Product: plasmashell
Version: 5.27.11
Platform: Kubuntu
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: plasma-b...@kde.org
Reporter: peter.fajd...@gmail.com
CC: k...@davidedmundson.co.uk
Target Milestone: 1.0
SUMMARY
This bug is related to the color scheme option "Tint all colors with accent
color" and using accent color from current wallpaper (a very nice feature,
btw).
Panels and windows constantly flicker. This is the same kind of flicker that
happens when changing the accent color, except that instead of a single
flicker, it flickers continuously.
This is a very finicky bug that happens only with a specific color scheme,
wallpaper, and even display settings (details below).
STEPS TO REPRODUCE
1. Set display resolution to 3440x1440.
2. Make sure the display is either the only display or is set as the primary
display.
3. Create a new color scheme based on Breeze Light, but with the option "Tint
all colors with accent color" checked.
4. Apply the new color scheme.
5. Select and apply the option "Use accent color: From current wallpaper".
6. Set the display's wallpaper to Fallen Leaf by Martin Klapetek (shipped with
Plasma).
7. Make sure wallpaper Positioning is set to "Scaled and Cropped".
Note: the order of the steps is not important.
OBSERVED RESULT
The panel and windows start to flicker continuously, as if constantly
reapplying the color from the wallpaper.
EXPECTED RESULT
The panel and windows should flicker only once as the color from the wallpaper
gets applied.
SOFTWARE/OS VERSIONS
KDE Plasma Version: 5.27.1
KDE Frameworks Version: 5.115.0
Qt Version: 5.15.13
Graphics Platform: X11
ADDITIONAL INFORMATION
3440x1440 is the native resolution of my external display. If I use any other
resolution (larger or smaller, even with the same aspect ratio), the bug isn't
triggered. Refresh rate doesn't seem to matter. The bug also doesn't trigger
when my laptop's built-in screen is set as the primary one, regardless of the
resolution set there (it doesn't support 3440x1440, though).
The accent color is picked from the primary monitor's wallpaper, and it seems
that if that wallpaper is Fallen Leaf scaled and cropped to 3440x1440, the bug
triggers.
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