This is probably not an issue with plymouth itself. When it hangs for you on shutdown, could you hit 'Esc' to expose the console, and take a screenshot of the last messages there?
Based on other bug reports, it does sound like there's a regression in shutdown hangs in 13.04, but we haven't yet been able to trace it back to a cause. ** 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/1178208 Title: Shutdown, restart and boot up process hangs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/plymouth/+bug/1178208/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs