Bug#531191: grub-pc update: system unbootable

[Felix Zielcke]

Am Samstag, den 30.05.2009, 18:15 +0200 schrieb steph:
> Package: grub-pc
> Version: 1.96+20090523-1
> Severity: critical
> Justification: breaks the whole system
> 
> Since last update my system is unbootable.
> At start after the bios:
> Error:the symbol 'grub_machine_fini' not found
> Then, I have a grub-rescue prompt
> This error becomes after a grub-install. If I downgrade to
> grub-pc/testing, a grub-install command make my system bootable.
> 
> I think that this problem is different of #530927  #530357
> because I've modified /etc/default/grub without any change.
> 
> The only way I can boot on this grub install on /dev/sdb is with
> another grub from another linux on /dev/sda. If I make a chainloader
> from this old grub, the grub on /dev/sdb works. In fact the problem
> becomes when I want to boot directly from bios to /dev/sdb.
> 

According to your device.map you even have /dev/hda. Maybe your BIOS is
loading grub2 from hda and that grub2 uses the /boot/grub from sdb.
I can only image that the embed core.img and /boot/grub is out of sync
but that never happens if you grub-install to the right device.
-- 
Felix Zielcke