https://bugs.kde.org/show_bug.cgi?id=461198
Bug ID: 461198
Summary: Wayland: Night Colour filter is restored incorrectly
to reconnected display
Classification: Plasma
Product: kdeplasma-addons
Version: 5.26.2
Platform: Archlinux
OS: Linux
Status: REPORTED
Keywords: reproducible, wayland
Severity: normal
Priority: NOR
Component: Night Color Control
Assignee: plasma-b...@kde.org
Reporter: manuel.manu.del...@gmail.com
CC: kwin-bugs-n...@kde.org, vlad.zahorod...@kde.org
Target Milestone: ---
SUMMARY
I recently switched from X11 to Wayland and found a regression with the Night
Colour filter being applied incorrectly.
I run a multi-monitor setup, where I usually turn off my monitor at night (when
Night Colour is active). When it is reconnected the next day (when Night Colour
is off), the monitor still has the Night Colour filter active. This did not
happen under X11.
To reset this state, I currently manually toggle Night Colour on and then back
off.
I also tested the reverse, (disconnect while filter off, reconnect with it on)
and it still happens. I assume there is just no check if the filter still
applies when the display is reconnected.
STEPS TO REPRODUCE
1. Have 2 monitors
2. Turn on Night Colour
3. Disconnect, or disable the second monitor
4. Turn off Night Colour
5. Reconnect the monitor
OBSERVED RESULT
The reconnected display still has the blue light filter applied, while on the
other one it is off
EXPECTED RESULT
The reconnected display has no blue light filter applied, like on the still
connected display.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux, Kernel 6.0.5-arch1-1 (amd64)
KDE Plasma Version: 5.26.2
KDE Frameworks Version: 5.99.0
Qt Version: 5.15.6
ADDITIONAL INFORMATION
Graphics Platform: Wayland (1.21.0)
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