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[Lore <lcusma@xxxxxxxxx>]

I've upgrade my system to the 15.04 and the audio problem has
disappeared, but the problem was returned when i installed VLC...
uninstalling it the audio will load correctly

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https://bugs.launchpad.net/bugs/1449987

Title:
  [hostname 9333, Intel Haswell HDMI, Digital Out, HDMI] No sound at all

Status in alsa-driver package in Ubuntu:
  New

Bug description:
  Very often at the system starting-up the audio isn't working (completely mute).
  Opening audio settings -> output, there is reported none device.

  Only by typing in bash "dpkg-reconfigure oem-audio-hda-daily-
  dkms_0.201502151246~ubuntu14.04.1_all.deb" at system's restart the
  audio works for only one time, at next system restart there's the same
  problem.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.16.0-36.48~14.04.1-generic 3.16.7-ckt9
  Uname: Linux 3.16.0-36-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.10
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/pcmC0D3p:   lorenzo    2614 F...m pulseaudio
   /dev/snd/controlC0:  lorenzo    2614 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Wed Apr 29 13:25:01 2015
  DistributionChannelDescriptor:
   # This is a distribution channel descriptor
   # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
   canonical-oem-somerville-precise-amd64-20130203-1
  InstallationDate: Installed on 2014-11-20 (159 days ago)
  InstallationMedia: Ubuntu 12.04 "Precise" - Build amd64 LIVE Binary 20130203-13:50
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaPlaybackTest: ALSA playback test through plughw:HDMI failed
  Symptom_Card: Audio interno - HDA Intel HDMI
  Symptom_DevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/pcmC0D3p:   lorenzo    2614 F...m pulseaudio
   /dev/snd/controlC0:  lorenzo    2614 F.... pulseaudio
  Symptom_Jack: Digital Out, HDMI
  Symptom_Type: No sound at all
  Title: [hostname 9333, Intel Haswell HDMI, Digital Out, HDMI] No sound at all
  UpgradeStatus: Upgraded to trusty on 2015-02-14 (73 days ago)
  dmi.bios.date: 09/11/2014
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A05
  dmi.board.name: 0D13CR
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnDellInc.:bvrA05:bd09/11/2014:svnDellInc.:pnXPS139333:pvr:rvnDellInc.:rn0D13CR:rvrA00:cvnDellInc.:ct8:cvr0.1:
  dmi.product.name: XPS13 9333
  dmi.sys.vendor: Dell Inc.
  mtime.conffile..etc.modprobe.d.alsa.base.conf: 2014-11-20T15:16:37.735889

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