the input mux can select rear mic, front mic , line in and audio mixer
node 0x21
this mean that the unavailable line in port cannot be the active port
Node 0x1e [Audio Selector] wcaps 0x300501: Stereo
Power states: D0 D1 D2 D3
Power: setting=D0, actual=D0
Connection: 6
0x2c 0x2b* 0x2a 0x29 0x28 0x21
Node 0x1f [Audio Selector] wcaps 0x300501: Stereo
Power states: D0 D1 D2 D3
Power: setting=D0, actual=D0
Connection: 6
0x2c 0x2b* 0x2a 0x29 0x28 0x21
ports:
analog-input-microphone-front: Front Microphone (priority 8500,
latency offset 0 usec, available: no)
properties:
device.icon_name = "audio-input-microphone"
analog-input-microphone-rear: Rear Microphone (priority 8200,
latency offset 0 usec, available: no)
properties:
device.icon_name = "audio-input-microphone"
analog-input-linein: Line In (priority 8100, latency offset 0
usec, available: no)
properties:
active port: <analog-input-linein>
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https://bugs.launchpad.net/bugs/1365769
Title:
[G41MT-S2P, VIA VT2020, Pink Mic, Rear] No sound at all
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