Comment 12 for bug 864271

odd - I won't be around until next weekend - so anyone please jump in.

But some suggestions:

ls -l / you should see a symlink that looks like:

lrwxrwxrwx 1 root root 33 2011-09-29 14:02 initrd.img -> /boot/initrd.img-3.0.0-12-generic
lrwxrwxrwx 1 root root 33 2011-09-17 13:22 initrd.img.old -> /boot/initrd.img-3.0.0-11-generic

Try deleting /initrd.img - or if it's not a symlink then that's probably the problem.

If there is still no /boot/initrd.img-3.0.0-12-generic then try rerunning

sudo update-initramfs -k 3.0.0-12 -c -v

and see if the -v gives you any more info about why it isn't creating it.

Dave