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

Takashi Iwai tiwai at suse.de
Thu Oct 31 08:44:31 CET 2013

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.


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