I was upgrading Ubuntu to 12.04 from 11.10 (x64) and right in the middle of the package installation I had a freeze (not Ubuntu's fault) forcing me to do a hard reset of my pc. Now the Ubuntu installation is completely broken I can only get access via recovery mode. I already tried
apt-get update && apt-get upgrade and the option to fix broken packages. Nothing changed.
So I'm wondering if its possible to fix the broken packages, or maybe to restore before the upgrade?