2010/10/14 Valentine Sinitsyn valentine.sinitsyn@gmail.com
There are laptop which has 2.1 speakers which subwoofer is connected to
master mono pin of the STAC codec , The ".1" subwoofer is most likely the result of a Low pass filter attached to the mono pin
Maybe - I'm not pretending I've seen all possible configurations. Since the idea I'm discussing is to just add some new models for several laptops with subwoffers, ultimately it doesn't matter which pin has the subwoofer connected, it just have to be correct pin for a given laptop family (0x17 for mine, whatever corresponds to Master Mono for someone else's etc).
https://bugtrack.alsa-project.org/alsa-bug/view.php?id=5031
The Dell XPS M1710 has 2.1 speakers with volume controls on both stereo speakers and Subwoofer,
Node 0x11 [Pin Complex] wcaps 0x400104: Mono Amp-Out Amp-Out caps: N/A Amp-Out vals: [0x00] Pincap 0x00000010: OUT Pin Default 0x90170311: [Fixed] Speaker at Int N/A Conn = Analog, Color = Unknown DefAssociation = 0x1, Sequence = 0x1 Misc = NO_PRESENCE Pin-ctls: 0x40: OUT Connection: 1 0x13