Originally Posted by k3lt01
The easiest thing you can do for yourself is back up everything you need to back up, download a new is and install 12.10 as a clean install. I have never found upgrading as simple or as clean as Ubuntu would like to suggest it is.
This is the best solution you will find.
It is probably very possible to correct your problem with out doing that but it will take longer than just doing a clean install.
The very fact that you are having a problem indicates that 12.04 is not as stable as it should be at this point and 12.10 is not either. With the low number of testers Ubuntu has right now this is no big surprise.
A clean install should work.