Created attachment 704083 [details]
/usr/sbin/alsa-info.sh --no-upload

The microphone of a headset plugged to the combo jack will not be recognized by
the system. 
Instead the internal mic stays active.

The headset is recognized as speaker and can be changed in pulseaudio. But for
the mic only the internal mic is shown.

All alsamixer settings have been checked.

Model settings have been tested for: 
Cirrus Logic CS4206/4207
========================
  mbp55        MacBook Pro 5,5
  imac27       IMac 27 Inch
  auto        BIOS setup (default) 

only auto is working at all.

I am using a macbook pro retina 10.1 (CS4206)
In OSX the headset mic is working.

It might me a pin not allocated in the alsa driver.