I've solved this issue. Upstart launches /etc/init/gdm.conf during boot, which causes a conflict with an already-running login manager such as lxdm. By simply renaming gdm.conf to gdm.conf.save, gdm doesn't get launched and lxdm is allowed to do its thing.
-- lxdm selected causes gdm and lxdm both to run https://bugs.launchpad.net/bugs/579538 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs