Comment 9 for bug 1227093

does your Sony Vaio support headset instead of headphone ?

are you using the headset provided by sony ?

there are two type of headsets :CTIA and OMTP using TRRS connector

if the mic Jack detection control is always true even when Mic is not plugged

control.14 {
  iface CARD
  name 'Mic Jack'
  value true
  comment {
   access read
   type BOOLEAN
   count 1
  }
 }

you need to use hda-jack-retask to set misc bit to disable Mic Jack detection of node 0x18 and change the capture source to internal mic