I have the same issue. Asus X450CA laptop with a single TRRS jack. External headphones work correctly, but the external microphone does not work at all. Only the built-in microphone (that hole next to the webcam) is detected. This has been happening since 13.10 (the first Ubuntu I installed on this laptop, which was brand-new at that time).
alsamixer shows: Master, Headphone, Speaker, PCM, Mic Boost, Mic Boost, S/PDIF, Capture, Auto-Mute Mode, Digital. Interesting that it shows two "Mic Boost" sliders, but there is no option to switch to the external microphone. The only recording device is called "Capture". alsa-info.sh output: http://www.alsa-project.org/db/?f=3fca8420153cf1b5424b490cf0d58f65224c27c1 Kernel release: 3.19.0-16-generic 0 [PCH ]: HDA-Intel - HDA Intel PCH HDA Intel PCH at 0xf7e10000 irq 32 00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04) Codec: Realtek ALC270 Other bug reports from other people: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1366639 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1382642 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/212378 https://askubuntu.com/questions/75828/external-microphone-not-working -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1359803 Title: External mic not being used in combo port To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1359803/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
