Bug#735932: [grub2-common] Computer does not boot

[Colin Watson]

On Sat, Jan 18, 2014 at 08:13:27PM +0100, Marco Righi wrote:
> The computer that does not boot has several disk installed (SATA, PATA
> and 1 external USB disk). The problem is born today after the
> apt-getdist-upgrade command.

Upgrading from which previous version?

> A disk contains /users directory (the main subdirectory are /users/home
> and /users/root) and the other disk other imformations.
> 
> I have completely erased the disk containing the operating system and I
> have installed from skratch linux again using the Debian Testing of
> today (CD version - I have used only the first disk).
> 
> After the installation I have the same problem. Grub says
> 
> error: file not found

I can't possibly investigate this without quite a bit more information.
To start with, could you please at least attach the /boot/grub/grub.cfg
file, the output of "debconf-show grub-pc", and also the information
that you alluded to here but didn't attach:

> Please attach the file:
>   /tmp/user/1000/reportbug-ng-grub2-common-FhfDux.txt
> to the mail. I'd do it myself if the output wasn't too long to handle.

Given that you have several disks, I suspect the problem might simply be
that you've failed to install GRUB to the disk that your system is
actually booting from; the error message above could well be from a
half-installed out-of-date version of GRUB on one of those disks, or
something similar.  This is a common mistake but very difficult for the
packaging to defend against since the PC architecture makes it
near-impossible to find this information accurately after boot.  Running
"dpkg-reconfigure grub-pc" as root and telling it to install to the
master boot records of all your non-removable disks is usually a
reliable way to fix this.

Thanks,

-- 
Colin Watson                                       [cjwatson at debian.org]