while i appreciate the effort, this has no effect on my issue. also maybe worth noting, i am using grub but not nomodeset. i toggled it on just to see if it would do anything but the problem persists.
if you look at my xrandr output on the first boot, the main problem is that it cannot see any other mode except 640x480 and running xrandr --output DP-0 --mode 1920x1080 fails. i cannot change it using plasma’s display settings gui or xrandr in any way - the only way i know how to get access to the other resolution/rate settings of that monitor is by rebooting.