Problems upgrading to 18.04 from 16.04 at xorg

Process seemed to be working until stalled in the install phase, before cleanup.

Computer will restart in 16.04

I tried redoing using software updater, but the choice to upgrade will not reappear. It does find LOTS of files to update, tried that, seemed to complete, but still no 18.04.

I’m trying to complete manually, but no luck so far.