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[Raymond <1332233@xxxxxxxxxxxxxxxxxx>]

you need to find out which unconnectecd pin complex is the headset mic

need to recomplie driver

patch_via.c

patch_vt1802

spec->parser_flags = HDA_PINCFG_HEADSET_MIC;

try three unconnected pin complex which pincap support IN one by one


	{ 0x??, 0x01a1913c }, /* use as headset mic, without its own jack detect */


Noe 0x29 [Pin Complex] wcaps 0x400481: Stereo
  Pincap 0x00002324: IN Detect
    Vref caps: HIZ 50 100
  Pin Default 0x50a701f0: [N/A] Mic at Int N/A
    Conn = Analog, Color = Unknown
    DefAssociation = 0xf, Sequence = 0x0
    Misc = NO_PRESENCE
  Pin-ctls: 0x00: VREF_HIZ
  Unsolicited: tag=00, enabled=0
  Power states:  D0 D1 D2 D3 EPSS
  Power: setting=D0, actual=D0
Node 0x2a [Pin Complex] wcaps 0x400481: Stereo
  Pincap 0x00002324: IN Detect
    Vref caps: HIZ 50 100
  Pin Default 0x418130f0: [N/A] Line In at Ext Rear
    Conn = 1/8, Color = Blue
    DefAssociation = 0xf, Sequence = 0x0
  Pin-ctls: 0x00: VREF_HIZ
  Unsolicited: tag=00, enabled=0
  Power states:  D0 D1 D2 D3 EPSS
  Power: setting=D0, actual=D0
Node 0x2b [Pin Complex] wcaps 0x400481: Stereo
  Pincap 0x00002324: IN Detect
    Vref caps: HIZ 50 100
  Pin Default 0x41a190f0: [N/A] Mic at Ext Rear
    Conn = 1/8, Color = Pink
    DefAssociation = 0xf, Sequence = 0x0
  Pin-ctls: 0x00: VREF_HIZ
  Unsolicited: tag=00, enabled=0
  Power states:  D0 D1 D2 D3 EPSS
  Power: setting=D0, actual=D0

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https://bugs.launchpad.net/bugs/1332233

Title:
  [HDA-Intel - HDA Intel PCH, recording] Recording problem

Status in alsa-driver package in Ubuntu:
  New

Bug description:
  I opened a thread in the forums first. For reference:
  http://ubuntuforums.org/showthread.php?t=2230136&p=13052352

  The basic issue is that I got a new Asus S400CA laptop. It has a combo
  jack for headphones/mic (like phones do now). With Windows 8, the
  headset worked fine (both input and output through the one jack). With
  Ubuntu 14.04 it works for output, but not for input.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.13.0-29.53-generic 3.13.11.2
  Uname: Linux 3.13.0-29-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  acampbell   3333 F.... pulseaudio
                        acampbell  23019 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Thu Jun 19 12:05:57 2014
  InstallationDate: Installed on 2014-06-14 (5 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=en_US
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaRecordingTest: ALSA recording test through plughw:PCH failed
  Symptom_Card: Built-in Audio - HDA Intel PCH
  Symptom_Type: Only some of inputs are working
  Title: [HDA-Intel - HDA Intel PCH, recording] Recording problem
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/28/2012
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: S400CA.206
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: S400CA
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrS400CA.206:bd11/28/2012:svnASUSTeKCOMPUTERINC.:pnS400CA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnS400CA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.name: S400CA
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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