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

[Takashi Iwai]

At Thu, 31 Oct 2013 08:09:12 +0000,
Lin, Mengdong wrote:
> 
> > -----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.

The driver thinks the pin 0x1a is active and 0x18 isn't.  That's the
point.  If 0x18 is really a valid input pin, the driver should either
provide that path in "Capture Source" (or "Input Source") mixer or
select automatically via plugging/unplugging (auto-mic).

In anyway, it's a waste of time to discuss without the further
hardware details like alsa-info.sh output.


Takashi