kernel-packages team mailing list archive

[Derick Eddington <1550765@xxxxxxxxxxxxxxxxxx>]

I've now tested the kernel fix with my hardware and confirmed it works.
I compiled Xenial's 4.4.0-14-generic kernel after applying the patch, by
following https://wiki.ubuntu.com/Kernel/BuildYourOwnKernel .  With the
patched kernel, my headset's headphones and microphone work and the
background noise isn't present, without needing an /etc/modprobe.d/snd-
hda-intel.conf for module option fix and without needing to disable
Loopback Mixing.

I had to slightly adjust Takashi Iwai's patch, with regards to line
numbers and surrounding context lines, to get it to successfully apply,
and I've attached this.

** Patch added: "patch_realtek.c.patch"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550765/+attachment/4605166/+files/patch_realtek.c.patch

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https://bugs.launchpad.net/bugs/1550765

Title:
  Headset doesn't work for HP EliteBook 755 G2

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  My laptop is an HP EliteBook 755 G2 (from mid 2015) that has a
  combined headset (headphone + mic) jack that doesn't work.  The
  speakers work fine and they mute when a headset is plugged in but the
  headphones don't work.

  This problem exists in Xenial Xerus and in 15.04 (I use the MATE
  flavor of both).

  A fix in the kernel has recently been made.  I've already reported the
  problem to the ALSA developers [1] and Takashi Iwai has already
  committed a fix which is currently queued for inclusion in the
  official kernel:

  https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/?id=f883982dc1b117f04579f0896821cd9f2e397f94

  I'd like to ask that this fix be included in Xenial Xerus's kernel.

  If it's helpful, see [1] for more details and links to other people
  having the same problem.

  [1] http://mailman.alsa-project.org/pipermail/alsa-
  devel/2016-February/104883.html

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-8-generic 4.4.0-8.23
  ProcVersionSignature: Ubuntu 4.4.0-8.23-generic 4.4.2
  Uname: Linux 4.4.0-8-generic x86_64
  NonfreeKernelModules: wl fglrx
  ApportVersion: 2.20-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/pcmC1D0p:   d          1192 F...m pulseaudio
   /dev/snd/controlC1:  d          1192 F.... pulseaudio
                        d          2874 F.... alsamixer
   /dev/snd/controlC0:  d          1192 F.... pulseaudio
  CurrentDesktop: MATE
  Date: Sat Feb 27 10:42:07 2016
  InstallationDate: Installed on 2016-02-20 (7 days ago)
  InstallationMedia: Ubuntu-MATE 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160219)
  MachineType: Hewlett-Packard HP EliteBook 755 G2
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-8-generic root=/dev/mapper/VGany-U1604a ro intremap=off priority=low
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-8-generic N/A
   linux-backports-modules-4.4.0-8-generic  N/A
   linux-firmware                           1.156
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/20/2015
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: M84 Ver. 01.10
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: 221C
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: KBC Version 63.16
  dmi.chassis.asset.tag: 5CG5100JQN
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvrM84Ver.01.10:bd10/20/2015:svnHewlett-Packard:pnHPEliteBook755G2:pvrA3009DD10303:rvnHewlett-Packard:rn221C:rvrKBCVersion63.16:cvnHewlett-Packard:ct10:cvr:
  dmi.product.name: HP EliteBook 755 G2
  dmi.product.version: A3009DD10303
  dmi.sys.vendor: Hewlett-Packard

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