Comment 26 for bug 1959888

I have the same problem...

And mine is worse - picking Ubuntu on XOrg has no effect.

ThinkPad P1 Gen3 has all HDMI/USBC monitors connected to NVidia only.

So I cannot use external monitor in any way shape or form. This is new, btw.

XDG_SESSION_DESKTOP=ubuntu-xorg
XDG_SESSION_TYPE=x11

$ prime-select query
nvidia

EDIT: Scratch that... Forced an update and moved to proposed and it started to work.