Re: [alsa-devel] Question about snd_mixer_selem_get_playback_dB_range()

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