Comment 27 for bug 613963

Precise howto to activate the subwoofer.

* First, remove the line "options snd-hda-intel model=ref" from the file /etc/modprobe.d/alsa-base.conf (sudo gedit ...). It doesn't work with precise.

* Download the script I made with hda-analyzer and copy it in /usr/bin (sudo wget https://bugs.launchpad.net/ubuntu/+source/linux/+bug/613963/+attachment/3160161/+files/hda_analyzer.py -O /usr/bin/hda_analyzer.py)

* Modify the file rc.local to auto launch the script : just add the line "python /usr/bin/hda_analyzer.py" before the "exit 0" (sudo gedit /etc/rc.local)

* Restart and it works.

* Just a little bug. The subwoofer isn't mute when headphones are plugged in. So, I made another script to auto mute the subwoofer when headphones are plugged in.

* Download the script to auto mute the subwoofer (wget https://bugs.launchpad.net/ubuntu/+source/linux/+bug/613963/+attachment/3160162/+files/subwoofer_mute.sh). Just open the "startup application" and add the script to auto launch it at every login.