Comment 16 for bug 1332900

do hda jack sense test also indicate the headset Jack is node 0x15, headphone Jack is 0x16

and Mic Jack is 0x19

https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1302090/comments/4

the current driver put two headphone jacks in multi out , this is good for supporting 5.1 but the drawback is your 2.1 speaker share the volume control and no bass playback volume controls

may need hint or Def assoicstion of the pins to determine whether subwoofer/headphone have priority to use the volume controls