I managed to reproduce it on archlinux + kde. Not sure if this would help, but i can provide outputs from arch.
-- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-amdgpu in Ubuntu. https://bugs.launchpad.net/bugs/1826316 Title: [amdgpu] Wayland sessions detect 4K screens (3840x2160) as only 1280x800. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1826316/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp