Upgrade to Ubuntu 11.10 problem: Waiting for network configuration then black screen solution

Have you just upgraded to Ubuntu 11.10 Oneiric Ocelot and now getting the “Waiting for network configuration” message followed by “Waiting up to 60 seconds more for network”? This then might be accompanied by a black blank screen.

The fix is here: https://bugs.launchpad.net/ubuntu/+source/dbus/+bug/811441/comments/24 which states:

You need to
(i) create directories /run and /run/lock,
(ii) move contents of /var/run into /run and /var/lock into /run/lock,
(iii) delete directories /var/run and /var/lock
(iv) create replacement simlinks; e.g. ‘ln -s /run /var/run’ and ‘ln -s /run/lock /var/lock’

So hit Ctrl+Alt+F1 at the blank screen, enter your username and password.
“sudo -i” to get a root login and follow the steps above.
Reboot and you have 11.10 back again.

Source: http://uksysadmin.wordpress.com/2011/10/14/upgrade-to-ubuntu-11-10-problem-waiting-for-network-configuration-then-black-screen-solution/