using hda-emu pin ctl of rear panels jack are set to zero when you plugged the headphone and set to OUT when you unplugged the headphone
> jack NID 0x14: cfg 0x01014010: [Jack] Line Out at Ext Rear NID 0x15: cfg 0x01011012: [Jack] Line Out at Ext Rear NID 0x16: cfg 0x01016011: [Jack] Line Out at Ext Rear NID 0x18: cfg 0x01a19840: [Jack] Mic at Ext Rear NID 0x19: cfg 0x02a19850: [Jack] Mic at Ext Front NID 0x1a: cfg 0x0181304f: [Jack] Line In at Ext Rear NID 0x1b: cfg 0x02214020: [Jack] HP Out at Ext Front NID 0x1e: cfg 0x01452130: [Jack] SPDIF Out at Ext Rear > jack 0x1b 1 send: NID=0x1b, VERB=0x709(exec_pin_sense), PARM=0x0 receive: 0x0 send: NID=0x1b, VERB=0xf09(get_pin_sense), PARM=0x0 receive: 0x80000000 send: NID=0x14, VERB=0x707(set_pin_ctl), PARM=0x0 send: NID=0x15, VERB=0x707(set_pin_ctl), PARM=0x0 send: NID=0x16, VERB=0x707(set_pin_ctl), PARM=0x0 CTL Notify: Front Headphone Jack:0, mask=1 JACK report Front Headphone, status 1 JACK report Rear Mic, status 0 JACK report Front Mic, status 0 JACK report Line, status 0 JACK report Line Out Front, status 0 JACK report Line Out Surround, status 0 JACK report Line Out CLFE, status 0 > jack 0x1b 0 send: NID=0x1b, VERB=0x709(exec_pin_sense), PARM=0x0 receive: 0x0 send: NID=0x1b, VERB=0xf09(get_pin_sense), PARM=0x0 receive: 0x0 send: NID=0x14, VERB=0x707(set_pin_ctl), PARM=0x40 send: NID=0x15, VERB=0x707(set_pin_ctl), PARM=0x40 send: NID=0x16, VERB=0x707(set_pin_ctl), PARM=0x40 CTL Notify: Front Headphone Jack:0, mask=1 JACK report Front Headphone, status 0 JACK report Rear Mic, status 0 JACK report Front Mic, status 0 JACK report Line, status 0 JACK report Line Out Front, status 0 JACK report Line Out Surround, status 0 JACK report Line Out CLFE, status 0 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1208218 Title: intermittent left-channel audio distortion To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1208218/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
