I’m running 3x 1080p@240hz monitors all with DP using a 2070 super. When I come back to my computer after a long period and need to wake it up, (sometimes) only two of the monitors wake back up. It seems random, but either my left monitor or my middle monitor stays off. I have yet to have issues with the right monitor. Meaning intermittent issues with DP-2 and DP-4, but not DP-0.
Opening up nvidia-settings and changing the refresh rate on the bad monitor, applying, and changing it back remedies the issue. It is a real pain in the butt to do every time.
Edit: Sometimes I need to switch refresh rates a couple of times for it to fix itself.
What do I need to start debugging this issue?
OS: Kubuntu 20.04
DE: KDE Plasma 5.18.8
NVIDIA driver: 510.47.03
This is kind of a sub problem I have been having that seems to be related to another more annoying problem I have been having, which I have outlined here:
I think the monitor staying asleep while waking up might be locked in the same state as the one falls asleep while I’m using the desktop. So solving the problem from my other thread might fix this issue.