[alsa-devel] Conexant CX20561 - Microphone problems

[Takashi Iwai]

At Tue, 3 Nov 2009 14:30:15 -0500,
Shawn Starr wrote:
> 
> On November 3, 2009 05:55:07 am Takashi Iwai wrote:
> > 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.
> > 
> There is still problems with the volume sensitivity,  but I will adjust to set 
> ext mic to zero. Do we need a quirk for the Lenovo W500 then?

Looks so.  Though, the SSID is identical with X200.
I'm wondering whether X200 works fine as is or not...

> Or that's a bug wrt to volume sensitivity and static interferences?

The mic boost volumes are missing in these quirks.
You can adjust manually via hda-verb, e.g.

	hda-verb /dev/snd/hwC0D0 0x1d SET_AMP 0x7003

for the built-in mic, and

	hda-verb /dev/snd/hwC0D0 0x18 SET_AMP 0x7003

for the mic jack.  Change the value between 0x7000 and 0x7004.


Takashi