Comment 19 for bug 1225622

did the Jack sense test return yes for node 0x1d when you plugged the Mic jack ?

Node 0x1d [Pin Complex] wcaps 0x400101: Stereo
  Control: name="Mic Phantom Jack", index=0, device=0
  Pincap 0x00000334: IN OUT Detect
    Vref caps: HIZ 50
  Pin Default 0x01a190f0: [Jack] Mic at Ext Rear
    Conn = 1/8, Color = Pink
    DefAssociation = 0xf, Sequence = 0x0
  Pin-ctls: 0x21: IN VREF_50
  Connection: 1
     0x1a

  device.profile.description = "Stereo analog"
  device.description = "VT8237A/VT8251 HDA Controller Stereo analog"
  alsa.mixer_name = "VIA VT1708"
  alsa.components = "HDA:11061708,173410d9,00100700 HDA:10573055,10573055,00100700"
  module-udev-detect.discovered = "1"
  device.icon_name = "audio-card-pci"
 ports:
  analog-input-microphone: Microfon (priority 8700, latency offset 0 usec, available: unknown)
   properties:
    device.icon_name = "audio-input-microphone"
 active port: <analog-input-microphone>