Grub: file not found

[Ralf Mardorf]

On Wed, 2014-01-08 at 00:51 +0100, Ralf Mardorf wrote:
> Pardon, no additional info is needed.
> 
> On Tue, 2014-01-07 at 16:49 -0500, Jerry Lapham wrote:
> > Actually, 11.04 was originally on sda6 and I cloned it to sda5, then I
> > upgraded sda6 to 12.04.
> 
> The startpoint of the clone is different to the startpoint of the
> original install.
> 
> > When I start the laptop, the GRUB that appears is definitely the one
> > on sda5.
> 
> > The entries for 3.2.0-58 and 2.6.38-16 on sda6 both point to the same
> > UUID.
> 
> What entries? Is the UUID for sda5 and sda6 the same ;)?
> 
> > One works and the other doesn't.
> 
> Sure, if you boot the old kernel for the new install, you likely not
> really boot the clone, but the original instead.
> 
> You need to do the grub-install /dev/sda thingy and to update grub.cfg.

PPS:

It's correct that the old GRUB and not the clone's GRUB is used, but you
are free to use what ever GRUB you prefer. You manually updated
grub.cfg? Since during the upgrade the grub.cfg only should be
automatically written for the clone and not be available for the new
install, but since it was an update, GRUB wasn't reinstalled, that's why
the old GRUB is used.

The easiest thing for you would be to run grub-install /dev/sda from the
old install (no chroot needed), and to run the os-prober-updater-thingy
(google is your friend). I prefer to manually edit grub.cfg directly.