linux-kernel - Re: PATCH: Fix snd-hda-intel boot hang on ASUS A8N-VM

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Date:	Wed, 17 Mar 2010 08:16:32 +0100
From:	Takashi Iwai <tiwai@...e.de>
To:	Brian Lindholm <brian_lindholm@...rs.sourceforge.net>
Cc:	perex@...ex.cz, alsa-devel@...a-project.org,
	linux-kernel@...r.kernel.org
Subject: Re: PATCH:  Fix snd-hda-intel boot hang on ASUS A8N-VM

At Tue, 16 Mar 2010 19:17:52 -0400,
Brian Lindholm wrote:
> 
> This patch fixes a regression in 2.6.33.x.  Was working in 2.6.32.x.
> 
>    Symptom:  Hang on boot at "HDA Intel".  Boots only if on-board sound 
> is disabled or if "snd-hda-intel.enable_msi=0" is appended to boot 
> parameters.
> 
>    Machine:  ASUS A8N-VM with Athlon-X2 processor.
> 
>    Relevant output from lspci -nn:
> 
> 00:10.1 Audio device [0403]: nVidia Corporation MCP51 High Definition 
> Audio [10de:026c] (rev a2)
> 
>    Relevant output from alsa-info.sh:
> 
> 00:10.1 Audio device: nVidia Corporation MCP51 High Definition Audio 
> (rev a2)
> 00:10.1 0403: 10de:026c (rev a2)
>          Subsystem: 10de:cb84
> 
>    Proposed patch (which has been confirmed to allow boot, with sound 
> active):

Thanks for the patch.  The issue was already fixed in a different way,
namely, disable MSI for all Nvidia controller chips.  The fix will be
included in the next pull request and stable kernel.


Takashi

> diff -dru linux-2.6.33-orig/sound/pci/hda/hda_intel.c 
> linux-2.6.33/sound/pci/hda/hda_intel.c
> --- linux-2.6.33-orig/sound/pci/hda/hda_intel.c        2010-03-16 
> 17:33:23.487938000 -0400
> +++ linux-2.6.33/sound/pci/hda/hda_intel.c      2010-03-16 
> 17:40:36.141225010 -0400
> @@ -2354,6 +2354,7 @@ static void __devinit check_probe_mask(s
>   static struct snd_pci_quirk msi_black_list[] __devinitdata = {
>          SND_PCI_QUIRK(0x1043, 0x81f2, "ASUS", 0), /* Athlon64 X2 + 
> nvidia */
>          SND_PCI_QUIRK(0x1043, 0x81f6, "ASUS", 0), /* nvidia */
> +       SND_PCI_QUIRK(0x10de, 0xcb84, "ASUS", 0), /* nvidia */
>          {}
>   };
> 
> Signed-off-by: Brian E Lindholm <brian_lindholm@...rs.sourceforge.net>
> 
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