You have line in jack and internal mic, but power setting are D3 instead
of D0
You need to file upstream bug report
It is strange that mic phantom jack is created instead of internal mic
phantom jack
control.22 { iface CARD name 'Mic Phantom Jack' value true comment {
access read type BOOLEAN count 1 } }
control.23 { iface CARD name 'Line Jack' value false comment { access
read type BOOLEAN count 1 } }
Node 0x0c [Pin Complex] wcaps 0x41048b: Stereo Amp-In Control: name="Line Boost
Volume", index=0, device=0 ControlAmp: chs=3, dir=In, idx=0, ofs=0 Amp-In caps:
ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0 Amp-In vals: [0x00 0x00] Pincap
0x00000024: IN Detect Pin Default 0x008b3020: [Jack] Line In at Ext N/A Conn =
Comb, Color = Blue DefAssociation = 0x2, Sequence = 0x0 Pin-ctls: 0x20: IN
Unsolicited: tag=02, enabled=1 Power states: D0 D3 EPSS Power: setting=D3,
actual=D0 Delay: 1 samples
Node 0x0d [Pin Complex] wcaps 0x41048b: Stereo Amp-In Control: name="Mic
Boost Volume", index=0, device=0 ControlAmp: chs=3, dir=In, idx=0, ofs=0
Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0 Amp-In vals:
[0x00 0x00] Pincap 0x00001764: IN Detect Balanced Vref caps: HIZ 50 GRD
80 Pin Default 0x90a00110: [Fixed] Mic at Int N/A Conn = Unknown, Color
= Unknown DefAssociation = 0x1, Sequence = 0x0 Misc = NO_PRESENCE Pin-
ctls: 0x24: IN VREF_80 Unsolicited: tag=00, enabled=0 Power states: D0
D3 EPSS Power: setting=D3, actual=D0 Delay: 1 samples
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Packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/1566596
Title:
MBP 8,2 internal microphone stopped working
Status in alsa-driver package in Ubuntu:
Incomplete
Bug description:
The internal microphone doesn't work in a Ubuntu Xenial installation.
The concrete model is Cirrus Logic CS4206. I've tested with the Xenial
live usb (2nd beta) and it doesn't work either, so it doesn't look
line I've broken something. However with the Wily live CD (both
standard Ubuntu and Kubuntu) it works.
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https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1566596/+subscriptions
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