Comment 15 for bug 1093792

you need to check the advance override checkbox

this allow you to change the pin default (e.g. misc bit , assoc, sequence, location , color, type of the pin complex

confirm to modify /etc/modprobe.d/alsa-base.conf and add the hdajackretask.fw

reboot the computer or reload snd-hda-Intel

check the power setting of those Widgets in the path from audio output to the subwoofer pin complex are D0