IRQ issue with the hda-intel module, 2.6.19 and my mobo?

IRQ issue with the hda-intel module, 2.6.19 and my mobo?

[Andrew Nelless]

Hi,

I've been testing the 2.6.19 RC kernels out (I always test early new mainline kernels early)
and have been getting the following MCE error consistantly when I load the snd_hda_intel
module

"Hardware Error
CPU 0 : Machine Check Exception
TSC 2df07369b0 4 Bank 4 b20000 00000000070f0f
This is not a software problem"

This has occured since 2.6.19-rc1 (actually, on 2.6.18-mm2 as well but I didn't think anything
of it at the time, it being an -mm patch). Despite the error claiming this is a hardware fault
*I think* using a little detective work i've narrowed the problem down to the way IRQ's are
munged on my motherboard.

I've been using the HDA Intel driver with the sound onboard the Asus A8NVM CSM motherboard
since 2.6.15 (ALSA 1.0.10? Sorry, I tend to use whatever ALSA version is bundled with the
kernel release).

I started playing around with modprobe and loading all the sound modules manually and when I
load the modules in a certain order I can *sometimes* get the ominous looking message
"Disabling IRQ #22" *instead of the MCE error*.. so I decided to look at the IRQ's.

Output of my /proc/interrupts on 2.6.18:
  http://andrew.nelless.net/2.6.19-hda-intel-problem/2.6.18-proc-interrupts.txt

I notice that HDA Intel and libata are sharing an IRQ (atleast I assume this is what this
shows?) so I decided to compare how IRQ's are being handled differently between 2.6.18 and
2.6.19-rc3 by looking at lines from dmesg containing 'irq' and running it through diff...

Diff:
  http://andrew.nelless.net/2.6.19-hda-intel-problem/dmesg-irqs-diff.txt
2.6.18:
  http://andrew.nelless.net/2.6.19-hda-intel-problem/2.6.18-dmesg-irqs.txt
2.6.19-rc3:
  http://andrew.nelless.net/2.6.19-hda-intel-problem/2.6.19-rc3-dmesg-irqs.txt

I've tried passing pci=routeirq to the kernel, which had no effect, and some of my hardware
doesn't work right with ACPI disabled so I haven't even tried that.

The kernel .config files i'm using can be found at the same path,
http://andrew.nelless.net/2.6.19-hda-intel-problem/

My amateur (and humble :-P) guess is that libata and hda-intel have started screwing with each
other on my motherboard because 2.6.19 is now using ACPI to route some IRQ's whereas before it
wasn't?

Is this the case? If so, where should I file a bug report? and if not, what else can I try to
track this down?

Thanks for reading,
 Andrew




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Re: IRQ issue with the hda-intel module, 2.6.19 and my mobo?

[Lee Revell]

On Fri, 2006-10-27 at 19:21 +0100, Andrew Nelless wrote:
> Hi,
> 
> I've been testing the 2.6.19 RC kernels out (I always test early new mainline kernels early)
> and have been getting the following MCE error consistantly when I load the snd_hda_intel
> module
> 
> "Hardware Error
> CPU 0 : Machine Check Exception
> TSC 2df07369b0 4 Bank 4 b20000 00000000070f0f
> This is not a software problem"
> 

This belongs on linux-kernel - the bug cannot be in ALSA.

Lee



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Re: IRQ issue with the hda-intel module, 2.6.19 and my mobo?

[enigma_0Z]

Actually, Andrew may be onto something.

There's a patch for hda-intel that "tdavis@dsl-only.net" has been
working on. This patch does the same thing for me with alsa 1.0.13 and
kernel 2.6.17... Of course, alsa 13 doesn't work on my system anyway.

On 10/27/06, Lee Revell <rlrevell@joe-job.com> wrote:
> On Fri, 2006-10-27 at 19:21 +0100, Andrew Nelless wrote:
> > Hi,
> >
> > I've been testing the 2.6.19 RC kernels out (I always test early new mainline kernels early)
> > and have been getting the following MCE error consistantly when I load the snd_hda_intel
> > module
> >
> > "Hardware Error
> > CPU 0 : Machine Check Exception
> > TSC 2df07369b0 4 Bank 4 b20000 00000000070f0f
> > This is not a software problem"
> >
>
> This belongs on linux-kernel - the bug cannot be in ALSA.
>
> Lee
>
>
>
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> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/alsa-devel
>

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Re: IRQ issue with the hda-intel module, 2.6.19 and my mobo?

[Richard Fish]

On 10/27/06, Andrew Nelless <andrew@nelless.net> wrote:
> Is this the case? If so, where should I file a bug report? and if not, what else can I try to
> track this down?

Just one thing I can think of:

modprobe snd_hda_intel disable_msi=1

-Richard

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Re: IRQ issue with the hda-intel module, 2.6.19 and my mobo?

[Lee Revell]

On Fri, 2006-10-27 at 14:55 -0400, enigma_0Z wrote:
> Actually, Andrew may be onto something.
> 
> There's a patch for hda-intel that "tdavis@dsl-only.net" has been
> working on. This patch does the same thing for me with alsa 1.0.13 and
> kernel 2.6.17... Of course, alsa 13 doesn't work on my system anyway.
> 

Unrelated issue.

Lee


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