For digital audio, if an HDMI device supports audio, it is required to
support the baseline format: stereo (uncompressed) PCM. Other formats
are optional, with HDMI allowing up to 8 channels of uncompressed audio
at sample sizes of 16-bit, 20-bit and 24-bit, with sample rates of 32
kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz and 192 kHz

if your other computer only support stereo, they don't need any speaker
allocation

Node 0x07 [Pin Complex] wcaps 0x40778d: 8-Channels Digital Amp-Out CP
  Control: name="HDMI/DP,pcm=8 Jack", index=0, device=0
  Control: name="IEC958 Playback Con Mask", index=2, device=0
  Control: name="IEC958 Playback Pro Mask", index=2, device=0
  Control: name="IEC958 Playback Default", index=2, device=0
  Control: name="IEC958 Playback Switch", index=2, device=0
  Control: name="ELD", index=0, device=8
  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-Out vals:  [0x00 0x00]
  Pincap 0x0b000094: OUT Detect HBR HDMI DP
  Pin Default 0x18560010: [Jack] Digital Out at Int HDMI
    Conn = Digital, Color = Unknown
    DefAssociation = 0x1, Sequence = 0x0
  Pin-ctls: 0x00:
  Unsolicited: tag=03, enabled=1
  Power states:  D0 D3 EPSS
  Power: setting=D0, actual=D0
  Connection: 0
  In-driver Connection: 3
     0x02 0x03 0x04

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/1264665

Title:
  [W65_67SZ, Intel Haswell HDMI, Digital Out, HDMI] Playback problem,
  pavucontrol shows hdmi signal but no sound on tv

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

Bug description:
  hdmi audio works with windows2go so hardware ok

  I tried this suggestion but no luck (intel_iommu=on,igfx_off ):
  https://bugzilla.kernel.org/show_bug.cgi?id=61471

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.11.0-15.22-generic 3.11.10
  Uname: Linux 3.11.0-15-generic x86_64
  ApportVersion: 2.12.5-0ubuntu2.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  joris      1860 F.... pulseaudio
   /dev/snd/controlC1:  joris      1860 F.... pulseaudio
  Date: Sat Dec 28 13:14:52 2013
  InstallationDate: Installed on 2013-12-04 (23 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 
(20131016.1)
  MarkForUpload: True
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaPlaybackTest: ALSA playback test through plughw:MID failed
  Symptom_Card: Intern geluid - HDA Intel MID
  Symptom_Jack: Digital Out, HDMI
  Symptom_Type: Only some of outputs are working
  Title: [W65_67SZ, Intel Haswell HDMI, Digital Out, HDMI] Playback problem
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/30/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1.00.01
  dmi.board.asset.tag: Tag 12345
  dmi.board.name: W65_67SZ
  dmi.board.vendor: Notebook
  dmi.board.version: Not Applicable
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: Notebook
  dmi.chassis.version: N/A
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr1.00.01:bd09/30/2013:svnNotebook:pnW65_67SZ:pvrNotApplicable:rvnNotebook:rnW65_67SZ:rvrNotApplicable:cvnNotebook:ct9:cvrN/A:
  dmi.product.name: W65_67SZ
  dmi.product.version: Not Applicable
  dmi.sys.vendor: Notebook

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