I've run distro upgrade from 14.04 to 15.10 with the release image. I chose "erase the disk and install Ubuntu" installation. No errors during installation and I'm able to login in normally.
Eventually I will get this message:
fsck from util-linux 2.26.2 /dev/mapper/ubuntu--vg-root: clean 194728/13557760 files, 947832/54231040 blocks
It then dumps me back to the login page. Cycle repeats and repeats, but never boots me into the desktop.
When I boot into recovery mode, I can run fsck from there, and it gives me the same clean message. However, it does give me the message:
"Error getting authority: Error initializing authority: Could not connect: No such file or directory (g-io-error-quark, 1)
Any ideas what's going on? I've re-run install a few times and get the same thing every time.