linux-kernel - Re: mmotm 2010-08-11

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Date:	Thu, 12 Aug 2010 21:37:33 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	Valdis.Kletnieks@...edu
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Wu Fengguang <fengguang.wu@...el.com>,
	linux-kernel@...r.kernel.org, alsa-devel@...a-project.org
Subject: Re: mmotm 2010-08-11 - audio volume issues

At Thu, 12 Aug 2010 14:59:32 -0400,
Valdis.Kletnieks@...edu wrote:
> 
> On Wed, 11 Aug 2010 16:10:49 PDT, akpm@...ux-foundation.org said:
> > The mm-of-the-moment snapshot 2010-08-11-16-10 has been uploaded to
> > 
> >    http://userweb.kernel.org/~akpm/mmotm/
> 
> Something appears to be borked in the ALSA arena.  There's no actual volume coming
> out of the system, and 'alsamixer' is insisting that the volume slider only goes from 0
> to 10% or so, no further.  However, experimentation shows that the volume slider
> in 'xine' *does* affect the 'Amp-Out vals' lines, and alsamixer has *no* effect on
> what 'Amp-Out vals' lists.
> 
> A diff of alsa-info.sh for the two kernels shows them being identical, so I'm only
> attaching one copy.

Hm, there shouldn't be a change regarding the volume control.
There can be an issue about PCM stream, e.g. in commit 
    eb541337b7a43822fce7d0c9d967ee149b2d9a96
    ALSA: hda - Make converter setups sticky

To be sure, could you try to revert it?  If it doesn't help but still
you get strange volume behavior, please get alsa-info.sh output at
different volume levels for comparison.


thanks,

Takashi
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