Random kernel update breakage

Michael Schwendt mschwendt at gmail.com
Wed Aug 25 09:10:36 UTC 2010

On Tue, 24 Aug 2010 22:29:54 -0400, Sam wrote:

> Every once in a while, something breaks when a kernel update gets installed. 
> It doesn't happen every time, I'd say that once in every thirty or so kernel 
> updates, grub fails to come up after a subsequent reboot.
> This is just a minor annoyance -- I'd have to boot the install CD in rescue 
> mode, let it mount Fedora on /mnt/sysimage, chroot to it, and execute 
> /sbin/grub-install -- but I'm wondering if anyone else is seeing this.

Yes, other people have seen it, too. Years ago already.

There used to be an old open bugzilla ticket about it. Cannot find it on
the overview page at http://bugz.fedoraproject.org
Could be that it has been closed because of no progress and the low
signal/noise ratio.

For many it isn't reproducible at all. The kernel packages don't rewrite
the boot loader, but just modify the grub.conf file. Via /sbin/new-kernel-pkg
and grubby.

And from those, who are hit by it occasionally, nobody attempts at
debugging it or collecting all the info. Dunno whether the root cause of
the problem is known by anyone.

Did you save a copy of the broken(?) GRUB in the MBR? (Would restoring
just the MRB instead of using grub-install would have fixed it already?)
Did you try to press keys early to enter GRUB menu and prevent it
from booting? Or did it fail to load much earlier?

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