Unknown file system: Grub Rescue error

[Tom H]

On Sat, Jan 5, 2013 at 5:07 AM, Conny Enström <uncurbed at telia.com> wrote:
> 2013-01-05 10:58, digambar padulkar skrev:
>>
>> Unknown file system: Grub Rescue
>
> http://askubuntu.com/questions/169113/error-unknown-filesystem-grub-rescue

The howto on that page's for grub1. Can the OP have grub1 after
installing 12.10?

To the OP: Do you have a "grub rescue" prompt?

If you do, what's the output of "set" and "ls".

Do you know on which partitions "/" and "/boot" are?