Comment 34 for bug 1464917

I have the same problem with Ubuntu 15.10, fresh install on a Lenovo B50-10: the system got stuck on shutdown or reboot (the last trace on screen, when I press Esc, is "Reached target shutdown").
I've tried waiting a few minutes (at least 10 min), but nothing changed... Only way to power off is to keep pressed power button (I don't think it is a good thing for the pc, but I have no other way to power off it)
Don't even know what to check to debug this (very annoying) issue.