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.
that’s worth checking - i don’t have a spare DP cable on hand to test, but you may be onto something.
previously, i tried unplugging and replugging the cable on the PC end, as well as trying other ports, to no avail.
just now, i tried replugging the end plugged into the monitor a few times and was able to reproduce the resolution issue a single time. this honestly just confuses me more though, because why would it happen only one time out of several cycles doing the exact same thing?
i’m gonna get another cable just to be sure but that wont be for a few days at least.