From mboxrd@z Thu Jan  1 00:00:00 1970
From: Clemens Ladisch <clemens@ladisch.de>
Subject: Re: Question about
	snd_mixer_selem_get_playback_dB_range()
Date: Mon, 21 Mar 2011 15:38:59 +0100
Message-ID: <4D876303.3090100@ladisch.de>
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To: Tanu Kaskinen <tanu.kaskinen@digia.com>
Cc: alsa-devel@alsa-project.org
List-Id: alsa-devel@alsa-project.org

Tanu Kaskinen wrote:
> On Mon, 2011-03-21 at 15:43 +0200, Raymond Yau wrote:
> > AFAIK , only those STAC920x codec has SND_CTL_TLV_DB_GAIN_MUTE
> 
> Also some broken HDA cards,

Where "some" = "those that use a STAC920x codec".

> What is not any driver bug?

That the hardware reported a wrong dB value for the lowest volume
setting.  The latest driver has a workaround.

> Is it a bug in alsa (the driver or alsa-lib or whatever) if
> snd_mixer_selem_get_playback_dB_range() returns something else than
> SND_CTL_TLV_DB_GAIN_MUTE as the min gain, if the lowest volume step for
> the element is mute?

Yes.


Regards,
Clemens