Reboot hangs from Cinnamon

[Frank McCormick]

I have several desktops installed on my 19 install, including Cinnamon 
and Mate.
I noticed this morning for the first time that a reboot from Cinnamon hangs.
I end up with a blank screen and one line at the time which as I recall 
mentions
reboot and some numbers.

Does anyone have a clue as to what is wrong?  Mate reboots fine as does 
XFCE.

Cheers