GRUB broken during upgrade to 11.04

[Artifex Maximus]

On Sun, May 1, 2011 at 8:11 PM, Freddy Van Ingelgom <freddyek at gmail.com> wrote:
> Yesterday I tried a test-machine with Ubuntu 10.10 and the urgrade to 11.04
> worked fine. Then, I upgraded one of my operational computers, and since I
> cannot start that computer anymore:
> error: symbol not found: 'grub_env_export'
> Then display "grub rescue>"
> I found a lot of information on how to rebuild grub: nothing worked!
> Is someone experiencing the same problem, and if so, did someone found a
> solution?

Similar problem happened here with a new install. Ubuntu just forgot
installing grub files and therefore I cannot use them at grub-rescue
prompt. I need to follow this guide to install grub files:

https://help.ubuntu.com/community/Grub2#Reinstalling%20from%20LiveCD

On next boot there was no grub menu but insmod and grub works finally
in CLI mode. Then I was able to use CLI commands to boot up system and
next apt-get update and dist-upgrade rebuilt initrd, create grub.cfg
and make system ok. I follow this process:

https://help.ubuntu.com/community/Grub2#Command%20Line%20and%20Rescue%20Mode

ls
set root=(hdX,Y)
linux /vmlinuz root=/dev/sdXY ro
initrd /initrd.img
boot

Bye,
a