[alsa-devel] ALC892, Clevo P150HM: Input Source gets reset to "Mic" every resume

[Raymond Yau]

2011/12/4 Julian Sikorski <belegdol at gmail.com>:
> Hi,
>
> whenever I resume the machine, the Input Source would get changed back
> from "Internal Mic" to "Mic". This is a bit annoying, because pulseaudio
> is unaware of that change. As a result, everything looks fine in
> pavucontrol but no sound gets recorded. A quick look at alsamixer -c0
> revealed the problem. My alsa info:
>
> http://www.alsa-project.org/db/?f=c5776b615a5f3b9ae624e4250fb0c2b69118ce26
>
> This is unrelated to the other problems I have been reporting, since
> this happens on a mostly-stock Fedora 3.1.2 kernel (the patch I added
> deals with xhci, not alsa).
>

As alc892 has two [Audio Mixer] instead of [Audio Selector]

I wonder whether the hardware support a more an advanced  "Input
Source" controls to support

"Mic"
"Internal Mic"
"Line"
"Mic + Internal Mic"
"Mic + Line"
"Internal Mic" + "Line"

instead of the current implementation

Simple mixer control 'Input Source',0
  Capabilities: cenum
  Items: 'Mic' 'Internal Mic' 'Line'
  Item0: 'Mic'


Node 0x22 [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
  Control: name="Input Source", index=1, device=0
  Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-In vals:  [0x00 0x00] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80
0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80]
[0x80 0x80] [0x80 0x80]
  Connection: 12
     0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x14 0x15 0x16 0x17 0x0b 0x12
Node 0x23 [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
  Control: name="Input Source", index=0, device=0
  Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-In vals:  [0x80 0x80] [0x00 0x00] [0x80 0x80] [0x80 0x80] [0x80
0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80]
[0x80 0x80]
  Connection: 11
     0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x14 0x15 0x16 0x17 0x0b