I updated Ubuntu 2 days ago and now I can't login, even in Safe Mode, since there's a Kernel Panic ('VFS not syncing', something like that). I know this is a bug but I don't want to reinstall everything again. Is there some way to make Ubuntu functional again? The problem too is that I don't have old kernels on my GRUB list, since it seems the update erased all of them.
Here's a picture of the kernel panic at boot: