UPDATE TO UBUNTU 18.04--

I updated after configuring the release upgrade from the keyboard.  I then connected from remote via SSH, and repeated the steps outlined above.  The update completed without a system hangup, and then rebooted.

On reboot, nvOC did not start the miner.  I issued "nvOC start", and received this response:

       "m1@m1-desktop:~$/home/m1/NVOC/mining/nvOC start
        Restarting nvOC tasks....

        Unable to init server: Could not connect: Connection refused
        # Failed to parse arguments: Cannot open display:
       m1@m1-desktop:~$"

I will go into the miner directory and set up a standalone start script; but I would like to set the system straight so that it can talk to itself.  Any suggestions?       --scryptr

P.S.  -- NOTE:  When towards the end of the update, I was given an ASCII (colored text) command prompt asking what to do with the "grub" script.  I had several choices.  I could keep the original, use the new grub supplied by the package manager, merge the two or three grub scripts, open a window to edit them, and etc.

I chose to keep the original.  The SSH session continued and scrolled through all the actions until it ended.  No big errors popped up.  I rebooted at the final prompt, and the system restarted.       --scryptr

P.P.S. -- I went to the keyboard and noticed that the monitor had no display.  The monitor reported "no signal".  However, via SSH, my miner is running just fine.  Further, if I open up the webpage/API display at the miner LAN address, the information is displayed properly.  The readout reports that I am running UBUNTU 18.04.

Any clues?       --scryptr