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From: Andi Kleen on 21 Jun 2010 12:20
James Bottomley <James.Bottomley(a)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.

-Andi
--
ak(a)linux.intel.com -- Speaking for myself only.
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From: Maciej Rutecki on 22 Jun 2010 10:30
On poniedziałek, 21 czerwca 2010 o 18:03:09 James Bottomley wrote:
> 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
>
> Means that we can't detect any PCI bus other than 0 and thus the system
> won't boot.
>
> The full dmesgs for a successful (2.6.34) and failed (2.6.35-rc3) boot
> are below.
>
> James

I created a Bugzilla entry at
https://bugzilla.kernel.org/show_bug.cgi?id=16271
for your bug report, please add your address to the CC list in there, thanks!

--
Maciej Rutecki
http://www.maciek.unixy.pl
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