I've just made the mistake of trying to install the proprietoy ATI drivers on 12.04 Ubuntu. It asked me to reboot, which I did, and was greyed with a kernel panic.
Now I'm looking for the undo button, and was hoping that I could perhaps leverage the fact that the filesystem is XFS, and one of its touted features is copy-on-write, meaning that the pre-nurfed files will still exist on my drive.
Can I roll back the changes, even though I didn't create a specific snapshot. If so, what's the best way of doing it?