This seems to be a gdm package bug. Before installing gdm, my /etc/X11/default-display-manager file contains: /usr/sbin/lightdm
After installing gdm, the file contains: /usr/sbin/gdm After uninstalling gdm, the file contains: lightdm And now lightdm doesn't start on boot. If you fix it back to "/usr/sbin/lightdm", it works again. This fixed the issue for people here too: http://ubuntuforums.org/showthread.php?t=1871148 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/875539 Title: Not starting automatically (/etc/dbus-1/system.d/org.freedesktop.DisplayManager.conf missing) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/875539/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs