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[madbiologist <298465@xxxxxxxxxxxxxxxxxx>]

There seems to be a fix for this issue in the 3.13 upstream kernel.
commit number c9a6338aecdb92f9d015ecc26d203e54250bebbb - ALSA: hda -
hdmi: Fix IEC958 ctl indexes for some simple HDMI devices

This fix has also been ccd to the stable kernel series.

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https://bugs.launchpad.net/bugs/298465

Title:
  No digital out with VIA VT1708b

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  I have an Asus M3N78-VM motherboard with VIA VT1708B onboard sound.

  This board has digital sound output via HDMI and a separate optical
  S/PDIF output jack. However on Intrepid I can only see the analog
  output device.

  
  Output from aplay -l:
  **** Liste von PLAYBACK Geräten ****
  Karte 0: NVidia [HDA NVidia], Gerät 0: VT1708B Analog [VT1708B Analog]
    Untergeordnete Geräte: 1/1
    Untergeordnetes Gerät '0: subdevice #0

  aplay -L:
  front:CARD=NVidia,DEV=0
      HDA NVidia, VT1708B Analog
      Front speakers
  surround40:CARD=NVidia,DEV=0
      HDA NVidia, VT1708B Analog
      4.0 Surround output to Front and Rear speakers
  surround41:CARD=NVidia,DEV=0
      HDA NVidia, VT1708B Analog
      4.1 Surround output to Front, Rear and Subwoofer speakers
  surround50:CARD=NVidia,DEV=0
      HDA NVidia, VT1708B Analog
      5.0 Surround output to Front, Center and Rear speakers
  surround51:CARD=NVidia,DEV=0
      HDA NVidia, VT1708B Analog
      5.1 Surround output to Front, Center, Rear and Subwoofer speakers
  surround71:CARD=NVidia,DEV=0
      HDA NVidia, VT1708B Analog
      7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
  hdmi:CARD=NVidia,DEV=0
      HDA NVidia
      HDMI Audio Output
  null
      Discard all samples (playback) or generate zero samples (capture)

  hanno@HANNO:~$ aplay -D hdmi:CARD=NVidia,DEV=0 ~/Desktop/SURROUNDTEST_DD_640.wav 
  aplay: main:583: Fehler beim Öffnen des Audiogerätes: No such file or directory

  hanno@HANNO:~$ cat /proc/asound/card0/codec#0 | grep Codec
  Codec: VIA VIA VT1708B 8-Ch

  hanno@HANNO:~$ cat /proc/asound/card0/codec#0 | grep -C 2 Digital 
      formats [0x1]: PCM
    Power: setting=D0, actual=D0
  Node 0x12 [Audio Output] wcaps 0x611: Stereo Digital
    Converter: stream=0, channel=0
    Digital:
    Digital category: 0x0
    PCM:
      rates [0x1e0]: 44100 48000 88200 96000
  --
    Connection: 1
       0x1e
  Node 0x15 [Audio Input] wcaps 0x100711: Stereo Digital
    Converter: stream=0, channel=0
    SDI-Select: 0
    Digital:
    Digital category: 0x0
    PCM:
      rates [0x1f0]: 32000 44100 48000 88200 96000
  --
    Pin-ctls: 0x20: IN
    Power: setting=D0, actual=D0
  Node 0x20 [Pin Complex] wcaps 0x400701: Stereo Digital
    Pincap 0x0810: OUT
    Pin Default 0x985601f0: [Fixed] Digital Out at Int HDMI
      Conn = Digital, Color = Unknown
      DefAssociation = 0xf, Sequence = 0x0
      Misc = NO_PRESENCE
  --
    Connection: 1
       0x12
  Node 0x21 [Pin Complex] wcaps 0x400601: Stereo Digital
    Pincap 0x0810030: IN OUT EAPD
    EAPD 0x2: EAPD

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