not sure why the subwoofer use TRRS Jack does it use spdif since 3 pins
http://www.intel.com/support/motherboards/desktop/sb/CS-032871.htm there is also a mono pin Node 0x17 [Pin Complex] wcaps 0x40050c: Mono Amp-Out Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1 Amp-Out vals: [0x80] Pincap 0x00000010: OUT Pin Default 0x411111f0: [N/A] Speaker at Ext Rear Conn = 1/8, Color = Black DefAssociation = 0xf, Sequence = 0x0 Misc = NO_PRESENCE Pin-ctls: 0x00: Power states: D0 D1 D2 D3 EPSS Power: setting=D0, actual=D0 Connection: 1 0x0f if subwoofer is only connected to right channel of node 0x16, the solution is force the driver in 4 channel mode and need pulseaudio to mix left and right to subwoofer you can also restrict the auto parser to put the two speaker pins into extra out but those notebook with three internal speakers to line out to support 5.1 for (i = 0; i < ARRAY_SIZE(mout->extra_out_nid); i++) if (!mout->no_share_stream && mout->extra_out_nid[i]) snd_hda_codec_setup_stream(codec, mout->extra_out_nid[i], stream_tag, 0, format); the retask of spdif to speaker won`t help since you lose the center and rear channels in 5.1 mode it is just use a bug in the auto parser and those alc880 codec with zero pin default at the digital pin complex -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1040873 Title: [N56VZ, Realtek ALC663, Black Headphone Out, Right] No sound at all: Subwoofer not working To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1040873/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
