I upgraded to 21.04 and now external HDMI connected monitor is not detected. I'm using both Intel and Nvidia 470 drivers. Can run with either successfully on main laptop monitor, but the external monitor is no longer detected. It was previously working flawlessly. I've tried with monitor connected at boot and hot plugging.
xrandr shows:
HDMI-1-1 disconnected (normal left inverted right x axis y axis)
Any help debugging is appreciated.
Bookmarks