I have a Dell XPS 15, set up to dual boot with windows and Ubuntu 16.04 LTS.
When I try to turn the machine off from Ubuntu:
it hangs indefinitely here:
and I have to manually kill it by holding the power switch down.
I have tried the suggestion here:
But no dice.
Any bright ideas as to what to do would be appreciated!
Incidentally, shutting down from windows is fine.