independent headphone should be disabled on notebook
analog device and alternate analog device must use different audio
output 0x03 and 0x04
Node 0x03 [Audio Output] wcaps 0x405: Stereo Amp-Out
Control: name="Headphone Playback Volume", index=0, device=0
ControlAmp: chs=3, dir=Out, idx=0, ofs=0
Device: name="AD1984 Analog", type="Audio", device=0
Device: name="AD1984 Alt Analog", type="Audio", device=2
Amp-Out caps: ofs=0x27, nsteps=0x27, stepsize=0x05, mute=0
Amp-Out vals: [0x1d 0x1d]
Converter: stream=0, channel=0
Power states: D0 D3
Power: setting=D0, actual=D0
Node 0x04 [Audio Output] wcaps 0x405: Stereo Amp-Out
Control: name="Speaker Playback Volume", index=0, device=0
ControlAmp: chs=3, dir=Out, idx=0, ofs=0
Amp-Out caps: ofs=0x27, nsteps=0x27, stepsize=0x05, mute=0
Amp-Out vals: [0x00 0x00]
Converter: stream=0, channel=0
Power states: D0 D3
Power: setting=D0, actual=D0
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https://bugs.launchpad.net/bugs/1324384
Title:
[Lenovo ThinkPad X61s] Speaker volume mutes itself in random intervals
after upgrade to 14.04
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