https://bugs.kde.org/show_bug.cgi?id=512653
Bug ID: 512653
Summary: Introduce support for gamma adjustment (e.g. through
Gammastep)
Classification: Plasma
Product: kwin
Version First 6.5.3
Reported In:
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
SUMMARY
Currently there is no way for a third-party program to alter the image
displayed on the screen under Wayland the way it was possible on X11 with e.g.
Redshift. This means it is not possible to perform actions such as reduce the
brightness below what the hardware supports, which is however fundamental with
many displays as they are too bright even at their minimum setting.
When trying to use gammastep, it complains that it can't do it; looking at the
project's GitLab page (https://gitlab.com/chinstrap/gammastep) it says that it
"supports the wlroots protocol for gamma adjustments,
but several Wayland compositors do not support this protocol. GNOME and KDE
have their own built-in mechanisms for adjusting color temperature on Wayland."
Providing this support in KWin would make it possible to offer users better
control over their setups and more options than what is currently available.
Personally, I find that not being able to reduce the brightness further than
what the hardware allows is a major deal breaker of Wayland as it makes staring
at the screen painful.
STEPS TO REPRODUCE
1. Launch gammastep from the terminal
OBSERVED RESULT
It complains that it cannot adjust the gamma.
EXPECTED RESULT
It works.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Endeavour OS
KDE Plasma Version: 6.5.3
KDE Frameworks Version: 6.20.0
Qt Version: 6.10.0
ADDITIONAL INFORMATION
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