From mboxrd@z Thu Jan  1 00:00:00 1970
From: James Bottomley <James.Bottomley@HansenPartnership.com>
Subject: Re: 2.6.35-rc3 regression: IBM Maia system is unbootable [ACPI
 related?]
Date: Mon, 21 Jun 2010 11:33:54 -0500
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To: Andi Kleen <andi@firstfloor.org>
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On Mon, 2010-06-21 at 18:18 +0200, Andi Kleen wrote:
> James Bottomley <James.Bottomley@HansenPartnership.com> writes:
> 
> > The system in question has a set of root bridges, with the CD rom (which
> > is seen) being on bus 0 and the SCSI controller, which doesn't show up
> > being on bus 1 (with several other things on busses > 1).
> >
> > The system uses ACPI to detect the multiple bridges, so it seems that
> > this failure in 2.6.35-rc3:
> >
> > ACPI: Core revision 20100428
> > ACPI Error: Hardware did not enter ACPI mode (20100428/evxfevnt-103)
> > ACPI Warning: AcpiEnable failed (20100428/utxface-147)
> > ACPI: Unable to enable ACPI
> 
> That probably causes all the other problems. Without ACPI enabled
> modern systems generally do not work.
> 
> Just guessing, but maybe try to revert
> 
> b430acbd7c4b919886fa7fd92eeb7a695f1940d3
> 
> That was the last change in this area.

I can confirm that reverting this over a vanilla 2.6.35-rc3 fixes my
boot problem.

James