Just upgraded to 11.10 (from 11.4) over night and it all looked good until a reboot while eating toast this morning. Pretty disappointing, and this has cost me about 3 hours of my day so far.
The system booted up but said “waiting for network” or something like that in the Ubuntu splash screen. It then said “Waiting another 60 seconds for network” and never came to a login prompt. If you press escape at that point, you can see that there’s some kind of DBUS problem.
After some experimentation and finally this thread, I did the following:
Press CTRL-ALT-F1 to get a login prompt.
Log in as myself.
sudo mv /var/run /run
sudo mv /var/lock /run/lock
sudo rmdir /var/run
sudo rmdir /var/lock
sudo ln -s /run /var/run
sudo ln -s /run/lock /var/lock
What a pain in the backside. I won’t be upgrading too quickly in the future. I think Ubuntu has some way to go if a distribution upgrade can cause such a headache for the average user.