I have installed Ubuntu Desktop 20.04 on an HP Z820 workstation with 2 NVIDIA cards, 1 1030 and a 1060.
I have 2 screens Attached, one to each GPU.
When Login in the screen on the 1030 show the purple background without login fields the screen attached to the 1060 show a black screen no login screens.
Mouse works fine and can navigate from one screen to the next, so both screens are active.
I can blindly press enter and then enter my password, press enter after which Login proceed and I get a normal session on both screens.
What it look like is that the black screen is not displaying the fields but that they are active.
Any idea how I can ensure both screens show the login screen and that one of them show the login fields ?