do the subwoofer need both left and right channel ?
try hda-analyer to change the volume sliders of audio mixer which is connected to subwoofet (node 0x0d ?)
speaker-test -c2 -t wave -D hw:0,0
do it work with 2.1 mode ?
https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1286021
do the subwoofer need both left and right channel ?
try hda-analyer to change the volume sliders of audio mixer which is connected to subwoofet (node 0x0d ?)
speaker-test -c2 -t wave -D hw:0,0
do it work with 2.1 mode ?
https:/ /bugs.launchpad .net/ubuntu/ +source/ pulseaudio/ +bug/1286021