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[David Sommen <1458301@xxxxxxxxxxxxxxxxxx>]

I can confirm it does work on the previous kernel, 3.19.0-16-generic. It
does not work on 3.19.0-18-generic.

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https://bugs.launchpad.net/bugs/1458301

Title:
  No more HDMI output visible/working

Status in alsa-driver package in Ubuntu:
  New

Bug description:
  All of a sudden, I believe as a result of a kernel upgrade, I cannot
  play sound via my HDMI output (television). The option is not listed
  anymore in sound settings or VLC. Video output on hdmi works fine. The
  internal speakers work fine as well.

  I have lenovo ideapad u330p.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.19.0-18.18-generic 3.19.6
  Uname: Linux 3.19.0-18-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/pcmC1D0c:   david      1478 F...m pulseaudio
   /dev/snd/controlC1:  david      1478 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sun May 24 10:48:56 2015
  InstallationDate: Installed on 2014-09-18 (248 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140917)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH successful
  Symptom_Card: Built-in Audio - HDA Intel PCH
  Symptom_PulsePlaybackTest: PulseAudio playback test successful
  Symptom_Type: Only some of outputs are working
  Title: [HDA-Intel - HDA Intel PCH, playback] Playback problem
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 03/20/2014
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 7CCN35WW
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: Cherry 3A
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Defined
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: IdeaPad U330p
  dmi.modalias: dmi:bvnLENOVO:bvr7CCN35WW:bd03/20/2014:svnLENOVO:pn20267:pvrIdeaPadU330p:rvnLENOVO:rnCherry3A:rvrNotDefined:cvnLENOVO:ct10:cvrIdeaPadU330p:
  dmi.product.name: 20267
  dmi.product.version: IdeaPad U330p
  dmi.sys.vendor: LENOVO

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