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[tai271828 <taihsiang.ho@xxxxxxxxxxxxx>]

trusty kernel 3.13.0-32.57 (e.g. the kernel before system updating) has
the same issue.

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https://bugs.launchpad.net/bugs/1407875

Title:
  [HP 14 Notebook PC][8086:1e20] mute LED does not work

Status in HWE Next Project:
  New
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  HP 14 Notebook PC (CID 201404-14936) on 14.04.1
  3.13.0-43-generic #72
  Audio Controller [8086:1e20]

  Steps to reproduce this bug:
  1. install 14.04.1 on HP 14 Notebook PC (CID 201404-14936) and boot to the desktop. Ready to use Ubuntu
  2. press mute key. The playback is muted.

  Expected result:
  The mute LED became amber.

  Actual result:
  The mute LED has no response.

  More information:
  sudo hda-verb /dev/snd/hwC0D0 0x18 SET_PIN_WIDGET_CONTROL 0x24
  sudo hda-verb /dev/snd/hwC0D0 0x18 SET_PIN_WIDGET_CONTROL 0x20
  could turn on/off the mute LED seperately.

  ---------------------------------------------------------

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-43-generic 3.13.0-43.72
  ProcVersionSignature: Ubuntu 3.13.0-43.72-generic 3.13.11.11
  Uname: Linux 3.13.0-43-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.6
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ubuntu     1521 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Tue Jan  6 14:05:21 2015
  HibernationDevice: RESUME=UUID=2121b5cf-c83b-4a11-ae45-a7fcc3a70048
  InstallationDate: Installed on 2014-12-18 (18 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  MachineType: Hewlett-Packard HP 15 Notebook PC
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-43-generic.efi.signed root=UUID=31c5f412-f969-4705-81f7-2e85fbf53b4d ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-43-generic N/A
   linux-backports-modules-3.13.0-43-generic  N/A
   linux-firmware                             1.127.10
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 06/17/2014
  dmi.bios.vendor: Insyde
  dmi.bios.version: B.34
  dmi.board.asset.tag: Type2 - Board Asset Tag
  dmi.board.name: 226C
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: 74.20
  dmi.chassis.asset.tag: Chassis Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnInsyde:bvrB.34:bd06/17/2014:svnHewlett-Packard:pnHP15NotebookPC:pvr098F110000000E10000000000:rvnHewlett-Packard:rn226C:rvr74.20:cvnHewlett-Packard:ct10:cvrChassisVersion:
  dmi.product.name: HP 15 Notebook PC
  dmi.product.version: 098F110000000E10000000000
  dmi.sys.vendor: Hewlett-Packard

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