I am affected by this bug, too. Using an nVidia GTX 660 with legacy nvidia-340 (both mainline as well as graphics-driver ppa) my system is working as before. Switching to 390 or even 396 leaves me at a blinking cursor DM both on sddm and gdm3. The only DM I could use has been lightdm but only after I chowned the .Xauthority file of my user home dir whilst it was running (sadly this is a no go for me as I rely on multi user sessions which do not work anymore since the upgrade to bionic).
-- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to mesa in Ubuntu. https://bugs.launchpad.net/bugs/1752053 Title: nvidia-390 fails to boot graphical display To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1752053/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp