https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/log/sound/pci/hda/patch_analog.c?qt=grep&q=thinkpad
you need to upgrade your alsa driver, the latest alsa driver won't expose two
capture subdevices when auto Mic selection is enabled on the notebook
ARECORD
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
Subdevices: 2/2
Subdevice #0: subdevice #0
Subdevice #1: subdevice #1
for playback, the new driver use volume control at both audio output nodes
Node 0x03 [Audio Output] wcaps 0x405: Stereo Amp-Out
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
Node 0x04 [Audio Output] wcaps 0x405: Stereo Amp-Out
Control: name="PCM Playback Volume", index=0, device=0
ControlAmp: chs=3, dir=Out, idx=0, ofs=0
Device: name="AD198x Analog", type="Audio", device=0
Amp-Out caps: ofs=0x27, nsteps=0x27, stepsize=0x05, mute=0
Amp-Out vals: [0x26 0x26]
Converter: stream=0, channel=0
Power states: D0 D3
Power: setting=D0, actual=D0
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https://bugs.launchpad.net/bugs/1311720
Title:
[7666WCA, Analog Devices AD1984, Speaker, Internal] No sound at all
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