I know 18.10 is already unsupported, but I guess it applies to later versions as well.
The solution to this is to make gdm use Xorg instead of Wayland. In file /etc/gdm3/custom.conf uncomment the line WaylandEnable=false -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to nvidia-graphics-drivers-340 in Ubuntu. https://bugs.launchpad.net/bugs/1800763 Title: After installing the package with version 340.107, the system won't start Status in nvidia-graphics-drivers-340 package in Ubuntu: Confirmed Bug description: On Ubuntu 18.10, after installing the 340.107 driver, the system hangs with the last line showing [OK] Started GNOME Display Manager. I'm not able to change to another TTY, the system is completely locked. After forced restart, entered recovery mode, with root terminal, and removed the driver, and then the systems starts using the Nouveau drivers. The GPU is a nVidia GeForce 9500GT. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-340/+bug/1800763/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

