[pmontra]

For the records, Debian 13 Gnome with Wayland works as well as with X11. The only reason I'm still using X11 is that backlight control doesn't work anymore with my old laptop (it did with Debian 11) and X11 can work around it with gamma correction and Wayland can not.

[ahartmetz]

KWin can do dimming in hardware or by messing with the colors - not sure how.

[pmontra]

Messing with colors looks like gamma correction and dimming in hardware is the backlight control that does not work anymore on my laptop.

I don't remember why gamma correction didn't work for me Wayland but I'll give it another try next year, maybe it got fixed by then. X11 is working perfectly well and it always did for me.