I also discovered this issue (or something similar) in Ubuntu 14.04. This is an old bug, but I will comment here instead of reporting a new bug.
When I run "sudo shutdown now" or "sudo telinit 1" to go to single-user mode, the Plymouth splashscreen appears briefly, but then a black screen appears with no text (there should be a root console there). The root console is there however, but invisible, because typing "telinit 2" blindly and then pressing <Enter> returns the system to the normal mode. If I disable the splashscreen (by removing the "splash" kernel parameter from the GRUB menu), switching to single-user mode works correctly. So, this is definitely a bug in Plymouth! I can't reproduce this bug is an VirtualBox VM, however (maybe Plymouth doesn't work correctly there). I must say that I'm using a laptop with Optimus graphics (using bumblebee). Don't know if that could have anything to do with this bug. Booting into recovery mode works fine. Another problem: switching to single-user mode kills all the consoles (tty1-tty6), but returning to normal mode doesn't restart them (lightdm is restarted correctly). I think this could be a very big problem on a server. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/560175 Title: switching from runlevel 5 to runlevel 1 locks up system To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/plymouth/+bug/560175/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
