I'm using Ubuntu 20.04 and after waking up from suspend I get a black screen with a cursor.
upgrade and it didn't fix the problem. I tried switching to lightdm but the problem is the same.
I tried pressing ctrl + alt +f1 and ctrl + alt +f3 and nothing happens. I'm on a laptop so I've tried using fn too, but still nothing.
The only thing that seems to work is holding down the power button to stop the machine.