mate panels

[Richard Kimber]

I've just done a fresh install of Ubuntu Mate 16.04.3 LTS

When I go to Additional Drivers and install either of the nVidia drivers
and then reboot (and incidentally the reboot button there doesn't
work, I had to reboot manually), the Mate panels have disappeared,
leaving just a desktop.

Any idea how to restore the mate panels?

I tried:
   mate-panel --reset
as mentioned in some google answers, but that doesn't do anything
noticeable.

- Richard Kimber