Installing xwayland did not seem to solve it for me. Upon reboot, gdm still just loads a grey screen. I cannot even seem to CTRL+ALT+F1 to get to another tty session in order to fix it. I have to boot to recovery, remount as read-write and then dpkg-reconfigure lightdm back to using lightdm.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1500673 Title: gdm unusable after upgrading to 15.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm/+bug/1500673/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs