http://voices.canonical.com/david.henningsson/2014/03/07/headset-jacks- on-newer-laptops/
the most reliable source is to actually look at the small icon present next to the jack. Does it look like a headphone (without mic), headset (with mic) or a microphon http://bazaar.launchpad.net/~unity-settings-daemon-team/unity-settings-daemon/trunk/view/head:/plugins/media-keys/what-did-you-plug-in/pa-backend.c In PulseAudio ports will show up with the following names: Headphones - analog-output-headphones Headset mic - analog-input-microphone-headset Jack in mic-in mode - analog-input-microphone However, since regular mics also show up as analog-input-microphone, we need to check for certain controls on alsa mixer level too, to know if we deal with a separate mic jack, or a multi-function jack with a mic-in mode (also called "headphone mic"). We check for the following names: Headphone Mic Jack - indicates headphone and mic-in mode share the same jack, i e, not two separate jacks. Hardware cannot distinguish between a headphone and a mic. Headset Mic Phantom Jack - indicates headset jack where hardware can not distinguish between headphones and headsets Headset Mic Jack - indicates headset jack where hardware can distinguish between headphones and headsets. There is no use popping up a dialog in this case, unless we already need to do this for the mic-in mode. */ you may need to file upstream bug report since there should be either headset Mic Jack or headset Mic phantom Jack for you to use the headset mic control.17 { iface CARD name 'Headphone Front Jack' value true comment { access read type BOOLEAN count 1 } } control.18 { iface CARD name 'Headphone Surround Jack' value false comment { access read type BOOLEAN count 1 } } -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1302090 Title: Dell Alienware 14, Speaker sound output is mono until a headphone jack is plugged To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1302090/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
