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[Raymond <1527205@xxxxxxxxxxxxxxxxxx>]

Δεκ 17 11:58:23 hostname kernel: [Firmware Bug]: Duplicate ACPI video
bus devices for the same VGA controller, please try module parameter
"video.allow_duplicates=1"if the current driver doesn't work.

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https://bugs.launchpad.net/bugs/1527205

Title:
  no sound card detected on Dell Latitude e6400 and Ubuntu 15.10

Status in alsa-driver package in Ubuntu:
  New

Bug description:
  When I installed Ubuntu 15.04 the sound was working OK. Then, it was
  working at a set sound level but I could not mute or turn it up/down.
  Then, no sound at all and no sound card detected.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: alsa-base 1.0.25+dfsg-0ubuntu5
  ProcVersionSignature: Ubuntu 4.2.0-21.25-generic 4.2.6
  Uname: Linux 4.2.0-21-generic x86_64
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  CurrentDesktop: Unity
  Date: Thu Dec 17 12:36:11 2015
  InstallationDate: Installed on 2015-08-04 (134 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  PackageArchitecture: all
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  SourcePackage: alsa-driver
  Symptom: audio
  UpgradeStatus: Upgraded to wily on 2015-12-17 (0 days ago)
  dmi.bios.date: 05/06/2010
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A24
  dmi.board.name: 0U695R
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA24:bd05/06/2010:svnDellInc.:pnLatitudeE6400:pvr:rvnDellInc.:rn0U695R:rvr:cvnDellInc.:ct8:cvr:
  dmi.product.name: Latitude E6400
  dmi.sys.vendor: Dell Inc.
  mtime.conffile..etc.modprobe.d.alsa.base.conf: 2015-10-06T23:14:05.224786

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