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[lasha <lasha.kitia@xxxxxxxxx>]

I found the solution (!), create a new file /etc/modprobe.d/intel.conf

add the following options:

options snd-hda-intel single_cmd=1
options snd-hda-intel probe_mask=1

This fixed my problem. Meanwhile when I restart, it has very strange
cracking sound coming from laptop, not speakers. how can I fix this?

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Packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/1542641

Title:
  PCI/internal sound card not detected

Status in alsa-driver package in Ubuntu:
  New

Bug description:
  When I type alsa force-reload several times in terminal, it fixes. but
  when I reboot, problem persists again.

  this is my alsa info before force-reload 
  http://www.alsa-project.org/db/?f=a6b8288b69c6fcaeb108200dc39df954d76b99e7

  this is alsa info after force-reload several times until sound arrives.
  http://www.alsa-project.org/db/?f=45f0c322bcbd6d63c0040080baa5fbb63d797aa0

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: alsa-base 1.0.25+dfsg-0ubuntu5
  ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
  Uname: Linux 4.2.0-16-generic x86_64
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/hwC0D2', '/dev/snd/pcmC0D7p', '/dev/snd/pcmC0D3p', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  CurrentDesktop: Unity
  Date: Sat Feb  6 17:46:56 2016
  InstallationDate: Installed on 2016-02-06 (0 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Title: PCI/internal sound card not detected
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/15/2015
  dmi.bios.vendor: HP
  dmi.bios.version: N78 Ver. 01.03
  dmi.board.name: 8100
  dmi.board.vendor: HP
  dmi.board.version: KBC Version 16.1F
  dmi.chassis.asset.tag: 5CD547351Q
  dmi.chassis.type: 10
  dmi.chassis.vendor: HP
  dmi.modalias: dmi:bvnHP:bvrN78Ver.01.03:bd10/15/2015:svnHP:pnHPProBook440G3:pvr:rvnHP:rn8100:rvrKBCVersion16.1F:cvnHP:ct10:cvr:
  dmi.product.name: HP ProBook 440 G3
  dmi.sys.vendor: HP

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