I have a laptop with docking & 3 screens. It's Ubuntu 20.10 and it's a fresh install from October. The screens have been set up at one time via the Settings->Screen Display and were working fine.
Recently my PC went into sleep mode or something like that and when it woke up I only had one screen (don't really remember the details). I had stuff I wanted to do so I didn't reset but did some xrandr commands to get my screen correct again. That worked.
However, this apparently has caused something to be permanently saved. When I now log into ubuntu it has only 2 screens (curiously it has 3 before logging in) and I have to do a:
xrandr --auto xrandr --output DP-0 --left-of DP-2
to get it how I want it. But trying settings->Display can no longer do any changes as it says "Changes Cannot be Applied" and underneath that "This could be due hardware limitations." as soon as I try to make changes.
I've seen suggestions on running an xrandr script at startup but as it was working just fine before, I'd rather get back to that situation. But how?