touch-packages team mailing list archive

[chrisolof <chrisolof@xxxxxxxxx>]

So it looks as if the bug that generated that commit was due to no sound coming out of the air's speakers and there's really not much talk about the TRRS mic-in functionality:
https://bugzilla.kernel.org/show_bug.cgi?id=60811

That commit may be responsible for the working sound and headphone
detection - but there may be more work to do in order to get the TRRS
mic working.  Likely why installing the latest ALSA driver isn't
changing anything with regard to the mic.

sudo hdajacksensetest -c 1 prints out:
Pin 0x10 (Grey Headphone, Left side): present = Yes

Anyway it sounds as if the pin configuration introduced in that patch
was gleaned from a Windows inf driver file back in 2013.  Makes me
wonder if the TRRS functionality is absent on Windows as well...

** Bug watch added: Linux Kernel Bug Tracker #60811
   http://bugzilla.kernel.org/show_bug.cgi?id=60811

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/1410618

Title:
  MacBook Air 6,2 TRRS Headset Mic Not Working

Status in alsa-driver package in Ubuntu:
  New

Bug description:
  Hello,

  I'm running Ubuntu Gnome 14.04 on a new MacBookAir6,2 with the Cirrus
  Logic CS4208 and would love to get the microphone part of the TRRS
  connector working. Mac OS picks up and utilizes the TRRS headset mic
  without issue so I know the hardware is a go.

  With the headset plugged in, running sudo hdajacksensetest -a results
  in:

  Pin 0x05 ( Digital Out, HDMI): present = No
  Pin 0x06 ( Digital Out, HDMI): present = No
  Pin 0x07 ( Digital Out, HDMI): present = No

  AlsaInfo output here:
  http://www.alsa-project.org/db/?f=cabc8cab44d308c8a3898c66d48d9be4fc5ccf83

  I opened up hdajackretask to find four pins:
  Green Headphone
  Pin ID: 0x10
  Headphone

  Internal Speaker
  Pin ID: 0x12
  Internal speaker

  Pink Mic
  Pin ID: 0x18
  Not connected

  Internal Mic
  Pin ID: 0x1c
  Internal mic

  Unplugging and replugging the headset changes the Output device in
  sound settings from Headphones to Speakers so that works, but nothing
  in the input tab ever changes. It always lists two devices: Internal
  Microphone and Microphone. Both of these seem to actually be the
  internal microphone in the mac - either works without the headset
  connected at all.

  So I'm not really sure how to proceed from here, but I'd be happy to
  run whatever diagnostic tests might prove useful and/or even
  contribute code toward a fix - but I just have no idea where to start.
  Is it as simple as just finding the right pin and telling the system
  to use it as a microphone?

  Similar bug report here:
  https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/950494

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1410618/+subscriptions