Comment 83 for bug 1752053

Upgraded from 17.10 to 18.04 less than an hour ago on my laptop.

I'm using nvidia-driver-396 from the graphics-drivers ppa (https://launchpad.net/~graphics-drivers/+archive/ubuntu/ppa) with gdm3. At first, I couldn't even get to the login screen.

#79 (Jean-Philippe Vignolo (popopow)) was right - it seems to be related to the xorg.conf file. Removing it solved the problem for me. Tried rebooting a few times and everything continues to work.