I had been running Ubuntu 16.04 lts and tried to upgrade through the Terminal, whilst running from 16.04 Desktop.
It failed to restart, and got stuck with a flashing message:
< Gave up waiting for suspended/ resume d ervice: /dev/sdc1: clean, 467342/16580608 files, 10722236/66302208 blocks >
Advanced options to restart in the old version fail also. There seems to be some kind of fatal loop here, where the old version has not been cleared away and I cannot access it either. I have files and settings I would rather save than perform a fresh install from a boot disk.
Trying gain access to my home file through the advanced features, has beaten me also, I am locked out from the files even with the password for the old system