This process = used to work after a fresh install and prior to the update of all the applications.
Now - based on information from the /var/log/syslog - it appears there is an issue with "authentication" for the restart process.
Jun 14 18:20:54 ubuntu gnome-session: WARNING: Unable to restart system: Authorization is required Jun 16 08:24:34 ubuntu gnome-session: WARNING: Unable to restart system: Authorization is required
I did install
mdadm - not sure if this is contributing to the situation.
As of now - have to issue the
sudo shutdown 0 -r command - to get the system to reboot.