do suvpbwoofer really work since both speaker and subwoofer connect to
same audio output ?


to add volume controls to speaker and subwoofer ,

either use hda Jack retask to remove one headphone jack

or

modify driver to increase badness when there are two headphone Jacks and
two speaker pins ,but only three audio output when cfg->line_out_type ==
auto_pin_hp_out since Def assoc of second headphone Jack is larger than
that of subwoofer (lower priority to assign volume control/audio output
)

this force driver to assign audio output/volume control to two speakers
first

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https://bugs.launchpad.net/bugs/1302090

Title:
  Dell Alienware 14, Speaker sound output is mono until a headphone jack
  is plugged

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