second screen black (cursor only) if using nvidia-gpu
Affected version
Provide at least the following information:
- ubuntu 20.4
- Affected Mutter version
- XOrg: yes (gnome-flashback) Wayland: not available
Bug summary
monitor is recognized by gnome-control-center, but display-numbers (shown in upper left are swapped to the values in gnome control center where my laptop-screen is one...but shows 2 in the edge).
on startup i see black screen on my second monitor, but when i move mouse to it, is see the mouse. if i move a window i don't see it on that monitor (only dragging-cursor). after locking/unlocking workstation i see background-image flickering
looks like hdmi-signal is broken frequently
Steps to reproduce
connect external monitor to hdmi prime-select nvidia reboot login
works this way on ubuntu 18.4 with same hardware!
What happened
second screen is black or have flickering background. shows only cursor, but no windows, new windows will be opened on that screen by default (notebook-screen is defined as primary in gnome-control)
What did you expect to happen
second screen should display background and windows dragged to this position...