I have a laptop with a pretty bad display; on Plasma X11 I have set the gamma to 0.80 because the whole screen is too washed out if set to 1.00. I cannot seem to do it on Plasma Wayland. The Kgamma KCM module does nothing. Is there a way to change my gamma settings somewhere ? Setting it in ~.config/kgammarc does nothing either. I'm on Plasma 5.12 beta on Archlinux with the new Night Color mode ; can I use it to set my gamma settings ?
Sorry, you can't use the new Night Color mode to set the overall gamma. But I tried to write its backends in a way to later add a second interface / KCM on Wayland for the typical overall gamma, color, brightness adjustment, that Kgamma provides on X. I have to add this to the list of things, that I want to get into the 5.13 Wayland session...
So, the gamma settings for Wayland have not been added to Plasma 5.13. Is it planned for 5.14 ?
It's planned. The problem is that there are some patches hold by missing review already for quite some time, which I need to land first before I can continue working on the gamma stuff.
*** Bug 396967 has been marked as a duplicate of this bug. ***
Still no gamma settings in Plasma 5.16 beta...
For Wayland, I think this depends on a color management protocol: https://gitlab.freedesktop.org/wayland/wayland-protocols/-/merge_requests/14
Related MR https://invent.kde.org/plasma/kwin/-/merge_requests/1335