linux-kernel - Re: 2.6.29 regression: left audio channel broken after resume from suspend with Intel HDA

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Message-ID: <s5hskjy5d2t.wl%tiwai@suse.de>
Date:	Fri, 24 Apr 2009 16:41:14 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	Tino Keitel <tino.keitel@...ei.de>
Cc:	linux-kernel@...r.kernel.org, alsa-devel@...a-project.org
Subject: Re: 2.6.29 regression: left audio channel broken after resume from	suspend with Intel HDA

At Fri, 24 Apr 2009 16:21:13 +0200,
Tino Keitel wrote:
> 
> On Fri, Apr 24, 2009 at 16:01:40 +0200, Takashi Iwai wrote:
> 
> [...]
> 
> > The codec communication looks a bit unstable on this device...
> > Does this still happen on the latest 2.6.30 version?
> 
> Yes, at least with 2.6.30-rc3. I reloaded snd-hda-intel a few times,
> and at some point /etc/init.d/alsa-utils start complained, I guess
> because some index numbers in  the mixer changed.

And this happens because the codec doesn't respond properly any more.
So, something triggers to screw up the communication with the codec.
I have no idea right now.  Possibly you can bisect the changes against
sound/pci/hda/patch_sigmatel.c...


> Attached is an example diff.

This diff looks OK.  The difference is just the current PCM stream
you are playing.  Others are identical.


thanks,

Takashi
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