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[petar ostojic <wowhellmail@xxxxxxxxx>]

I have same problem on Asus X550L.
When I change microphone port in 'pavucontrol', from microphone(internal) to microphone(unplugged), i can hear sound from internal microphone, but its very, very quiet, even with maximum boost of 11.00dB   
External microphone dose not work at all.
@Raymond
Notebook have combo microphone/headphones jack

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/1334617

Title:
  [X550LB, Realtek ALC233, Mic, Internal] not working Ubuntu 14.04

Status in “alsa-driver” package in Ubuntu:
  Expired

Bug description:
  http://www.alsa-
  project.org/db/?f=70fd0de0d58f680c5a74ff1fbcf6dc46de5e5dc8

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.13.0-30.54-generic 3.13.11.2
  Uname: Linux 3.13.0-30-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  alexander   2433 F.... pulseaudio
   /dev/snd/controlC1:  alexander   2433 F.... pulseaudio
                        alexander   3242 F.... alsamixer
  CurrentDesktop: Unity
  Date: Thu Jun 26 13:22:07 2014
  InstallationDate: Installed on 2014-06-23 (3 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaRecordingTest: ALSA recording test through plughw:PCH failed
  Symptom_Card: Встроенное аудио - HDA Intel PCH
  Symptom_DevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  alexander   2433 F.... pulseaudio
   /dev/snd/controlC1:  alexander   2433 F.... pulseaudio
                        alexander   3242 F.... alsamixer
  Symptom_Jack: Mic, Internal
  Symptom_Type: No sound at all
  Title: [X550LB, Realtek ALC233, Mic, Internal] No sound at all
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/19/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: X550LB.402
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: X550LB
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: ATN12345678901234567
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrX550LB.402:bd11/19/2013:svnASUSTeKCOMPUTERINC.:pnX550LB:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnX550LB:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.name: X550LB
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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