This doesn't seem all that easy to reproduce (i. e. getting into the state where /etc/X11/default-display-manager says just "lightdm")? Anyway, this is primarily an upgrade issue and does not affect a clean install, so it can be fixed in an SRU.
** Changed in: lightdm (Ubuntu Oneiric) Milestone: ubuntu-11.10 => None -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/864174 Title: boot hangs waiting for lightdm after purging gdm (wrong default- display-manager) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/864174/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs