After a fresh install (reformatting the entire disk) of Ubuntu 9.10 or Mythbuntu 9.10, system freezes while loading Grub (grub2). Normal rescue techniques (booting from live CD and running update-grub) don't work. Update-grub fails with:
Generating grub.cfg ...
Found memtest86+ image: /boot/memtest86+.bin
grep: /proc/mounts: No such file or directory
Cannot find list of partitions!
done