Bug#709808: [grub-pc] boot failure after updaing

[Colin Watson]

On Tue, May 28, 2013 at 08:45:59PM +0200, Steven Post wrote:
> On Tue, 2013-05-28 at 10:30 +0100, Colin Watson wrote:
> > sudo dpkg-reconfigure grub-pc
> > 
> > ... and configure it properly.  Presumably you switched disks at some
> > point in the past and didn't tell the GRUB packaging so that it could
> > sort this out; in general this does work if done properly.
> 
> Thanks, looks good now.
> I don't recall ever seeing the screen where it asks for the disks like
> that. Maybe a recent introduction? I have been tracking testing/sid
> since Squeeze went into freeze, so perhaps I missed it. I never
> 'switched' disks in this system afaik, only added.... except maybe that
> one time were I was kind of forced to replace the motherboard.

It dates back to April 2009.  The installer would have dealt with
configuring it on systems installed afresh with GRUB 2; at least some
changes in hardware will force grub-pc to display it again on upgrade,
but it is probably still possible to confuse it, certainly if the old
disks are still around but no longer used for booting.  Unfortunately
the PC architecture doesn't really make it possible to do a fully
correct job here without constantly nagging people with upgrade prompts.

-- 
Colin Watson                                       [cjwatson at debian.org]