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[Alessandro Losavio <alessandro.losavio.21@xxxxxxxxx>]

I have the same problem on a Lenovo Edge e540.

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https://bugs.launchpad.net/bugs/1314361

Title:
  [20ARA0S100, Intel Haswell HDMI, Digital Out, HDMI] No sound at all

Status in “alsa-driver” package in Ubuntu:
  Confirmed

Bug description:
  Audio works on internal speakers and headphones using  card 1 (HDA
  Intel PCH).  But pavucontrol will let me choose HDMI even though it
  appears under "aplay -l" and under /proc/asound things look ok to me.

  Also note: this is a laptop on a Thinkpad Ultradock with the HDMI
  plugged into the dock.   I note that alsa driver does not detect the
  audio line out on the dock and there is no way to play through that
  channel.  I'm not sure that this is related, but perhaps has to do
  with some lack of support for the dock?

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  weinberg   2821 F.... pulseaudio
   /dev/snd/controlC0:  weinberg   2821 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Tue Apr 29 15:00:08 2014
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-04-18 (11 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaPlaybackTest: ALSA playback test through plughw:HDMI failed
  Symptom_Card: Built-in Audio - HDA Intel HDMI
  Symptom_DevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  weinberg   2821 F.... pulseaudio
   /dev/snd/controlC0:  weinberg   2821 F.... pulseaudio
  Symptom_Jack: Digital Out, HDMI
  Symptom_Type: No sound at all
  Title: [20ARA0S100, Intel Haswell HDMI, Digital Out, HDMI] No sound at all
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 03/19/2014
  dmi.bios.vendor: LENOVO
  dmi.bios.version: GJET74WW (2.24 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20ARA0S100
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Defined
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrGJET74WW(2.24):bd03/19/2014:svnLENOVO:pn20ARA0S100:pvrThinkPadT440s:rvnLENOVO:rn20ARA0S100:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 20ARA0S100
  dmi.product.version: ThinkPad T440s
  dmi.sys.vendor: LENOVO

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