linux-kernel - Re: Regression in 3.0-git after commit c82693db52beced0419cecf09a3c81adfe95a544

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Date:	Thu, 04 Aug 2011 07:17:18 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	Larry Finger <Larry.Finger@...inger.net>
Cc:	Jaroslav Kysela <perex@...ex.cz>,
	LKML <linux-kernel@...r.kernel.org>, alsa-devel@...a-project.org,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: Regression in 3.0-git after commit c82693db52beced0419cecf09a3c81adfe95a544 - sound does not work

At Wed, 03 Aug 2011 16:41:08 -0500,
Larry Finger wrote:
> 
> In the latest git pull of 3.0-git from Linus's tree, the sound on my HP laptop 
> does not work. This problem was bisected to the commit in the subject.
> 
> The lspci output for my sound device is:
> 
> 00:07.0 Audio device [0403]: nVidia Corporation MCP67 High Definition Audio 
> [10de:055c] (rev a1)
>          Subsystem: Hewlett-Packard Company Device [103c:30d6]
>          Kernel driver in use: snd_hda_intel
> 
> I further isolated the problem to the following hunk:
> 
> diff --git a/sound/pci/hda/patch_conexant.c b/sound/pci/hda/patch_conexant.c
> index 6e90b6b..4ca880b 100644
> --- a/sound/pci/hda/patch_conexant.c
> +++ b/sound/pci/hda/patch_conexant.c
> @@ -1994,10 +1990,8 @@ static int patch_cxt5051(struct hda_codec *codec)
>          board_config = snd_hda_check_board_config(codec, CXT5051_MODELS,
>                                                    cxt5051_models,
>                                                    cxt5051_cfg_tbl);
> -#if 0 /* use the old method just for safety */
>          if (board_config < 0)
> -               board_config = CXT5051_AUTO;
> -#endif
> +               board_config = CXT5051_AUTO; /* model=auto as default */
>          if (board_config == CXT5051_AUTO)
>                  return patch_conexant_auto(codec);
> 
> In my case, snd_hda_check_board_config() returns -1. Thus, the new code returns 
> the value of patch_conexant_auto(), whereas the original version fell through to 
> the setup code below. Clearly, this is needed for my device.

And reverting the above fixes your problem, right?
Then please give alsa-info.sh outputs on both working and non-working
kernels (run with --no-upload option).


thanks,

Takashi
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