SOLVED: kernel 6.3.9 breaks X11 resolution options for amd iGPU on ryzen laptops (ryzen 6900hs) not allowing to change resolutions on plasma x11 for built in screens (zephyrus g14 2022).
downgrade to 6.3.8
SDDM 20.0 breaks MAGIC TOKENS XAUTHORITY in ways i don’t understand (can’t restore tmux after reboot as i can’t run commands like redshit, x11 magic tokens don’t match, no authorization protocol specified, can’t open display :0 inside restored tmux while i can in normal terminal). downgrade to 19.0