[alsa-devel] Realtek HD-A codec ALC262: How to unmute mixer node 0x24 Amp-In for Mic Pin 0x18

[Lin, Mengdong]

> -----Original Message-----
> From: Takashi Iwai [mailto:tiwai at suse.de]
> Sent: Thursday, October 31, 2013 3:45 PM
> To: Lin, Mengdong
> Cc: alsa-devel at alsa-project.org; Kailang; Pshou
> Subject: Re: [alsa-devel] Realtek HD-A codec ALC262: How to unmute mixer
> node 0x24 Amp-In for Mic Pin 0x18
> 
> At Thu, 31 Oct 2013 06:17:29 +0000,
> Lin, Mengdong wrote:
> >
> > Hi,
> >
> > We found when recording on ALC262, the audio mixer node 0x24 mutes the
> input from Mic Pin node 0x18, so we get silent data.
> > Would someone please give me some advice to solve this?
> >
> > Node 0x24 [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
> >   Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
> >   Amp-In vals:  [0x80 0x80] [0x80 0x80] [0x00 0x00] [0x80 0x80] [0x80 0x80]
> [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80]
> >   Connection: 9
> >      0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x14 0x15 0x0b
> >
> > I cannot find user-space amixer controls to unmute node 0x18.
> >
> > The recording data flows from Mic Pin 0x18 -> Mixer 0x24 -> audio input 0x07.
> The Amp-In value on pin 0x18 (Rear Mic Boost) and input 0x07 (Capture Volume)
> are okay.
> 
> Too little hardware information.  Please give alsa-info.sh output at least.  In
> the output above, 0x1a is chosen as the active input path, so the driver looks
> working as expected somehow.

Yes. The driver is okay. I need to select the input pin for the mixer, as Kailang suggested.

Thanks
Mengdong