missing internal mic capture volume for int mic 0x1e when there are two
ext mic 0x1a and 0x1b


Node 0x14 [Audio Input] wcaps 0x100d1b: Stereo Amp-In R/L
  Control: name="Mic Capture Volume", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=0, ofs=0
  Control: name="Mic Capture Switch", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=0, ofs=0
  Control: name="Mic Capture Volume", index=1, device=0
    ControlAmp: chs=3, dir=In, idx=1, ofs=0
  Control: name="Mic Capture Switch", index=1, device=0
    ControlAmp: chs=3, dir=In, idx=1, ofs=0
  Device: name="CONEXANT Analog", type="Audio", device=0
  Amp-In caps: ofs=0x4a, nsteps=0x50, stepsize=0x03, mute=1
  Amp-In vals:  [0x80 0x80] [0x50 0x00] [0x4a 0x4a] [0x4a 0x4a]
  Converter: stream=4, channel=0
  SDI-Select: 0
  PCM:
    rates [0x160]: 44100 48000 96000
    bits [0xe]: 16 20 24
    formats [0x1]: PCM
  Power states:  D0 D1 D2 D3 D3cold EPSS
  Power: setting=D0, actual=D0
  Connection: 4
     0x17* 0x18 0x23 0x24

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https://bugs.launchpad.net/bugs/1074615

Title:
  Internal microphone don't work on Acer AO722

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