Comment 18 for bug 1284466

one of your headphone jack is alway plugged

https://launchpad.net/~diwic/+archive/hda

install snd-hda-tools and

run hda-jack-sense-test -a

/sys/class/sound/hwC0D0/driver_pin_configs:
0x0f 0x0221101f
0x0e 0x02a79130

it is a driver bug to set misc bit of the mic jack