[alsa-devel] Conexant CX20561 - Microphone problems

[Takashi Iwai]

At Mon, 2 Nov 2009 11:36:21 -0500,
Shawn Starr wrote:
> 
> On November 2, 2009 08:05:37 am Takashi Iwai wrote:
> > At Thu, 29 Oct 2009 18:59:40 -0400,
> > 
> > Shawn Starr wrote:
> > > Hello ALSA developers,
> > >
> > > I am having problems with the microphone on the following hardware this
> > > is on a Lenovo W500 laptop.
> > >
> > > Card: HDA Intel
> > > Chip: Conexant CX20561 (Hermosa)
> > >
> > > Here is the problems im noticing:
> > >
> > > 1) If I use ALSA 'default' with the microphone I get noise interference
> > > on output [high/low/high/low].
> > >
> > > If I switch this to use the "ALSA Capture on HDA Intel [CONEXANT Analog]
> > > I get interference except it is the standard 60Hz electrical noise
> > > [steady noise]
> > >
> > > 2) Using the internal/external microphones gives an inconsistent volume.
> > > It also does not seem to work with the microphone cutting out so much. I
> > > need to adjust Digital + another microphone but it still drops capturing.
> > >
> > > Alsamixer shows:  Digital/Docking Microphone/External Microphone/Internal
> > > Microphone
> > >
> > > Here is the module options I give to the sound driver:
> > >
> > > options snd-intel-hda enable_msi=1 power_save=10
> > > power_save_controller=true model=laptop index=0
> > >
> > > Assuming power saving/controller causes the microphone to cut out or not.
> > >
> > > 3) I'm now aware that this card has no pinouts for PCM capture
> > > https://bugzilla.redhat.com/show_bug.cgi?id=502293
> > 
> > Could you give alsa-info.sh output?  Run with --no-upload option, and
> > attach the generated file.
> > 
> Here's the attached output, 

Judging from the pin config, in your case, "Docking" seems controlling
the external-mic volume.  The "External Mic Volume" should be zero.


Takashi