Public bug reported: At first glance, this seems similar to this bug: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics- drivers-390/+bug/1752053/+index?comments=all
However, none of the solutions listed there work and the workaround is to use lightdm instead of gdm3: sudo apt install lightdm If it doesn't ask you to set the default display manager, then do this after, and set lightdm as the default: sudo dpkg-reconfigure gdm3 After that, the system will boot and let you log in normally. This problem is happening on a Clevo laptop without Optimus, with a discrete nvidia gtx 970m device, after installing any of the modern nvidia drivers from version 390 onward, from the official repo, from the graphics PPA, and I presume also the official driver from the nvidia site. It happens on both Ubuntu 18.04.1 + updates, and Ubuntu 18.10 + updates. I tested with nvidia driver versions 390, 396, and 415. gdm3 works fine until you install the nvidia driver. ** Affects: gdm3 (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1808658 Title: gdm3 crashes after (and sometimes before) login with nvidia-driver-390 and a gtx 970m To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1808658/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs