Yum update chnages BIOS setting

[Adam Williamson]

On Fri, 2012-11-23 at 16:44 +0100, Ralf Corsepius wrote:
> On 11/23/2012 12:32 PM, Sergio wrote:
> >
> >
> > --- Em sex, 23/11/12, Chuck Forsberg WA7KGX N2469R <caf at omen.com> escreveu:
> >
> >> De: Chuck Forsberg WA7KGX N2469R <caf at omen.com>
> >> Assunto: Yum update chnages BIOS setting
> >> Para: "Fedora" <test at lists.fedoraproject.org>
> >> Data: Sexta-feira, 23 de Novembro de 2012, 6:50
> >> I have done a few kernel updates of
> >> Fedora 18 without
> >> major incident until today.
> >>
> >> This time the BIOS boot order was changed to point to sda
> >> instead of sdf where Fedora 18 resides.  I noticed when
> >> I
> >> discovered that the reboot after yum update dumped me
> >> into Fedora 16, which couldn't talk to the internet any
> >> more.
> >>
> >> Once I grokked it I changed the BIOS boot drive order back
> >> to starting with sdf and things went back to normal.
> >>
> >
> > Maybe it's the UEFI thing? Normal BIOS isn't touched by OS updates.
> >
> Hmm, for quite a while (starting around ca. F15), I have been 
> experiencing boot issues with Fedora, the only explanation I have for, 
> is something in Fedora could be modifying the BIOS or Fedora not being 
> able to interact correctly with the BIOS [1].
> 
> Unfortunately, so far I haven't managed to identify the cause of these 
> issues :(
> 
> Ralf
> 
> [1] E.g. today, an update of a Fedora 17 installation on an external USB 
> HD-disk seems to have shredded a partition on the main (internal) disk.
> 
> My wild guess would be BIOS-drive order has changed between installation 
> time and run-time. As things appears to me, something (grub2?) has 
> written to the wrong disk (hdaX instead of hdbX).

If you're going to report something that is this a) vague, b) seemingly
unlikely and c) important in the apparently unlikely case that it's
actually true, you're _really_ going to have to include logs. There is
no possible way we can figure out what happened without the install
logs.
-- 
Adam Williamson
Fedora QA Community Monkey
IRC: adamw | Twitter: AdamW_Fedora | identi.ca: adamwfedora
http://www.happyassassin.net