/sys/class/sound/hwC0D2/init_pin_configs: 0x0a 0x0221101f 0x0b 0x40f000f1 0x0c 0x40f000f7 0x0d 0x90170110 0x0e 0x02a11020 0x0f 0x02011030 0x10 0x40f000f2 0x11 0x40f000f3 0x12 0x40f000f4 0x13 0x90a6012e 0x14 0x40f000f5 0x21 0x985610a0 0x22 0x40f000f6 /sys/class/sound/hwC0D2/driver_pin_configs: 0x21 0x01442070 0x0c 0x90a79130 0x0f 0x0227011f 0x0e 0x02a79130 as the driver use pin fixup, you have to contact the author who added the pin fixup assuninh the pin complex 0x0d is really the internal speaker, the driver need to create speaker playback volume and switch at 0x02 since 0x0d can only connect to 0x02 this mean that headphone at 0x0a should use audio output 0x03 and create headphone playback volume and switch at 0x03 to support 5.1 by retasking mic jack as output and use audio output 0x04 Node 0x02 [Audio Output] wcaps 0xd0c05: Stereo Amp-Out R/L Control: name="Headphone Playback Volume", index=0, device=0 ControlAmp: chs=3, dir=Out, idx=0, ofs=63 Control: name="Headphone Playback Switch", index=0, device=0 ControlAmp: chs=3, dir=Out, idx=0, ofs=0 Device: name="STAC92xx Analog", type="Audio", device=0 Amp-Out caps: N/A Amp-Out vals: [0x47 0x47] Converter: stream=8, channel=0 Power: setting=D0, actual=D0 Delay: 13 samples Node 0x03 [Audio Output] wcaps 0xd0c05: Stereo Amp-Out R/L Amp-Out caps: N/A Amp-Out vals: [0xff 0xff] Converter: stream=0, channel=0 Power: setting=D3, actual=D3 Delay: 13 samples Node 0x04 [Audio Output] wcaps 0xd0c05: Stereo Amp-Out R/L Amp-Out caps: N/A Amp-Out vals: [0xff 0xff] Converter: stream=0, channel=0 Power: setting=D3, actual=D3 Delay: 13 samples Node 0x05 [Audio Output] wcaps 0xd0c05: Stereo Amp-Out R/L Control: name="Headphone Playback Volume", index=1, device=0 ControlAmp: chs=3, dir=Out, idx=0, ofs=63 Control: name="Headphone Playback Switch", index=1, device=0 ControlAmp: chs=3, dir=Out, idx=0, ofs=0 Amp-Out caps: N/A Amp-Out vals: [0x47 0x47] Converter: stream=8, channel=0 Power: setting=D0, actual=D0 Delay: 13 samples Node 0x0a [Pin Complex] wcaps 0x400181: Stereo Pincap 0x0000173f: IN OUT HP Detect Trigger ImpSense Vref caps: HIZ 50 GRD 80 Pin Default 0x0221101f: [Jack] HP Out at Ext Front Conn = 1/8, Color = Black DefAssociation = 0x1, Sequence = 0xf Pin-ctls: 0xc0: OUT HP VREF_HIZ Unsolicited: tag=01, enabled=1 Connection: 2 0x02* 0x03 Node 0x0d [Pin Complex] wcaps 0x400181: Stereo Control: name="Speaker Phantom Jack", index=0, device=0 Pincap 0x0000173f: IN OUT HP Detect Trigger ImpSense Vref caps: HIZ 50 GRD 80 Pin Default 0x90170110: [Fixed] Speaker at Int N/A Conn = Analog, Color = Unknown DefAssociation = 0x1, Sequence = 0x0 Misc = NO_PRESENCE Pin-ctls: 0x40: OUT VREF_HIZ Unsolicited: tag=00, enabled=0 Connection: 1 0x02 Node 0x0e [Pin Complex] wcaps 0x400181: Stereo Control: name="Mic Jack Mode", index=0, device=0 ControlAmp: chs=0, dir=In, idx=0, ofs=0 Control: name="Mic Phantom Jack", index=0, device=0 Pincap 0x00001737: IN OUT Detect Trigger ImpSense Vref caps: HIZ 50 GRD 80 Pin Default 0x02a79130: [Jack] Mic at Ext Front Conn = Analog, Color = Pink DefAssociation = 0x3, Sequence = 0x0 Misc = NO_PRESENCE Pin-ctls: 0x24: IN VREF_80 Unsolicited: tag=00, enabled=0 Connection: 1 0x04 Node 0x0f [Pin Complex] wcaps 0x400181: Stereo Pincap 0x00001737: IN OUT Detect Trigger ImpSense Vref caps: HIZ 50 GRD 80 Pin Default 0x0227011f: [Jack] HP Out at Ext Front Conn = Analog, Color = Unknown DefAssociation = 0x1, Sequence = 0xf Misc = NO_PRESENCE Pin-ctls: 0x40: OUT VREF_HIZ Unsolicited: tag=00, enabled=0 Connection: 1 0x05 http://forum.notebookreview.com/dell-xps-studio-xps/296079-5-1-audio-m1530-3.html