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[Raymond <1509921@xxxxxxxxxxxxxxxxxx>]

spec->gen.hp_mic = 1;
 /* Mic-in is same pin as headphone */ 
/* Disable boost for mic-in permanently. (This code is only called 		  
 from quirks that guarantee that the headphone is at NID 0x1b.) */ 
snd_hda_codec_write(codec, 0x1b, 0, AC_VERB_SET_AMP_GAIN_MUTE, 0x7000); snd_hda_override_wcaps(codec, 0x1b, get_wcaps(codec, 0x1b) & ~AC_WCAP_IN_AMP);



Is there any reason to enable headphone mic when boost cannot be enabled ?


spec->gen.hp_mic = 1; 

This seem force the driver not creating Front Headphone Jack ?



Do

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Touch seeded packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/1509921

Title:
  [HDA-Intel - HD-Audio Generic, recording] No sound at all

Status in HWE Next:
  New
Status in alsa-driver package in Ubuntu:
  Confirmed

Bug description:
  This is a desktop box, with following ports:
  front jack: a single headset combo jack
  rear jacks: mic, speaker, line-in

  An "Analog Input" consistently show up even there is nothing plugged,
  but I'm not able to record using headset via front combo jack or rear mic jack, they all recorded with noises.

  00:01.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Device [1002:9840]
  00:14.2 Audio device [0403]: Advanced Micro Devices, Inc. [AMD] FCH Azalia Controller [1022:780d] (rev 02)

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.13.0-66.108-generic 3.13.11-ckt27
  Uname: Linux 3.13.0-66-generic x86_64
  NonfreeKernelModules: fglrx
  ApportVersion: 2.14.1-0ubuntu3.16
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  u          1824 F.... pulseaudio
   /dev/snd/controlC0:  u          1824 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Mon Oct 26 11:46:46 2015
  InstallationDate: Installed on 2015-10-23 (2 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaRecordingTest: ALSA recording test through plughw:Generic_1 failed
  Symptom_Card: Built-in Audio - HD-Audio Generic
  Symptom_DevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  u          1824 F.... pulseaudio
   /dev/snd/controlC0:  u          1824 F.... pulseaudio
  Symptom_Type: No sound at all
  Title: [HDA-Intel - HD-Audio Generic, recording] No sound at all
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 05/21/2015
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.0.0
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 3
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: Not Specified
  dmi.modalias: dmi:bvnDellInc.:bvr1.0.0:bd05/21/2015:svnDellInc.:pnInspiron3655:pvr1.0.0:rvnDellInc.:rn:rvr:cvnDellInc.:ct3:cvrNotSpecified:
  dmi.product.name: Inspiron 3655
  dmi.product.version: 1.0.0
  dmi.sys.vendor: Dell Inc.

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