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Date: Fri, 14 Oct 2011 18:29:54 -0600
From: Robert Hancock <hancockrwd@gmail.com>
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To: Chris Palmer <chris.palmer@pobox.com>
CC: linux-kernel@vger.kernel.org
Subject: Re: [PROBLEM] ASUS Sandybridge motherboards + PCI not working (IRQ
 n: nobody cared)
References: <4E98175A.8040905@pobox.com>
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On 10/14/2011 05:04 AM, Chris Palmer wrote:
> Interrupt handling for *PCI boards with ASUS Sandybridge motherboards*
> seems to be broken.
>
> It has been seen with network and non-network PCI boards. PCIx network
> boards work OK. And all reports are for ASUS motherboards.
>
> It always results in the infamous "IRQ n: nobody cared" message usually
> within an hour. It is possible to restart things by rmmod/modprobe on
> the appropriate PCI driver.
>
> Andrew Morton kindly took a quick look and thinks it is most likely an
> ACPI bug.
>
> Configuration summary:
>   - ASUS P8H67-V/R3 Motherboard (others have problems with similar M/Bs)
>   - M/B BIOS 0804 (just updated to that - no change)
>   - Core i5/2500K
>   - Onboard ethernet (at11c driver - works)
>   - Additional PCIx Intel ethernet board (e1000e driver - works)
>   - Additional PCI Broadcom BCM5702X ethernet board (tg3 driver - fails)
> 	[ Also fails with other PCI boards such as RTL8139 ]
>   - Kernel 3.0.6
>
>
> Any help much appreciated...
>
> Previous references:
>
> https://lkml.org/lkml/2011/6/30/197
> https://bugzilla.kernel.org/show_bug.cgi?id=38632
> https://bugzilla.redhat.com/show_bug.cgi?id=713351
> https://bugzilla.kernel.org/show_bug.cgi?id=35332
> https://bugzilla.kernel.org/show_bug.cgi?id=34242
> https://bugzilla.kernel.org/show_bug.cgi?id=32242
> https://bugzilla.kernel.org/show_bug.cgi?id=39122

The bugzilla reports aren't currently accessible so I don't know if it 
was posted there, but can you post the output of "lspci -vv" as root? 
Could be that some other device is configured on that IRQ and sometimes 
spuriously generates interrupts.