Bug#598961: Had to manually rerun grub-install --force, perhaps due to kernel upgrade

[Vladimir 'φ-coder/phcoder' Serbinenko]

On 10/03/2010 03:33 PM, Richard Kettlewell wrote:
> Package: grub-pc
> Version: 1.98+20100804-5
>
> My unstable/sid system failed to boot, with (IIRC) "GRUB GRUB hard
> disk error" displayed after the BIOS.  It had previously been booting
> just fine with grub-pc (after upgrading from lenny).  There might have
> been kernel upgrade since the last successful boot, I couldn't say for
> sure.
>
> In at attempt to repair it I booted off an Ubuntu karmic live CD and
> chroot'd into the installed system.  I check device.map and it looked
> correct.  I ran grub-install --force /dev/sda (and /dev/sdb, not that
> the BIOS tries to boot off that disk anyway).  I used --force because
> the partition layout on this machine requires it.
--force /dev/sdb wouldn't work in any case. Previously it created broken
install now it complains and aborts.
--force relies on FS not reordering blocks, an assumption which is false
and make break unexpectedly.
Another vector of the problem is that you run grub-install yourself
where as in blocklist installs it should be rerun after every update
(sudo dpkg-reconfigure grub-pc)
>
> I then ran apt-get dist-upgrade.  This included a kernel upgrade.
>
> The next attempt to boot also failed, but with just "GRUB" appearing
> after the BIOS.
>
> I used the live CD in the same way as above, except without any
> upgrading, and re-ran grub-install.
>
> After this, attempting to boot worked fine.
>
> Sorry this isn't much to go on!  At a wild guess the kernel upgrade is
> botching some grub-related step, perhaps that only matters when
> blocklists are in use.
>
> ttfn/rjk
>
>
>
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>


-- 
Regards
Vladimir 'φ-coder/phcoder' Serbinenko


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