Can you check whether downgrading to the 12.04 version of the plymouth packages fixes this issue? There are a lot of moving parts here, it could just as well be a kernel regression as a plymouth one.
** Changed in: plymouth (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1016170 Title: No login screen unless "quiet splash" removed from boot line To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/plymouth/+bug/1016170/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs