After install Ubuntu 20.04 I tried to connect a second monitor via HDMI in my laptop ASUS ( Intel® Core™ i5-6300HQ CPU @ 2.30GHz × 4 ) - (Nvidia GeForce GTX 960M ) and Ubuntu and Nvidia settings detects I connected it, but the only thing I can see is a blank screen.
I tried with a Live USB, I have the same result. I tried to modify the xorg.conf (I added “Primay GPU” “Yes”) and nothing changes.
Anyone had this similar problem? Or someone can help me and tell me how can I try to fix this? On Ubuntu 18.04 and W10 it works perfectly.