ftp://download.nvidia.com/XFree86/gpu-hdmi-audio-document/gpu-hdmi-
audio.html


6.1.2. Chipset with 8-channel support, single stream

This configuration is used in MCP77, MCP78, MCP79, MCP7A, and ION.


ELD and PD information is not available on these chipsets.


if controller can not pass your HDMI TV or reciever ’s EDID which
contain the speaker layout,

http://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/plain/Documentation/sound/alsa
/Channel-Mapping-API.txt

you need to ask the author how to manually provide the channel map when
you are using multi channel HDMI

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to pulseaudio in Ubuntu.
https://bugs.launchpad.net/bugs/881490

Title:
  Switched channels on HDMI 5.1 setup  (Nvidia ION)

Status in “pulseaudio” package in Ubuntu:
  Confirmed

Bug description:
  I've choosen a Surround setup (HDMI 5.1) via sound preferences, and I
  got a problem. Some channels were inverted. I used the Hardware "Test
  speakers' to verify. The center sound was appearing on the rear-left,
  and so on... The only right channels were front-left and front-right.

  After search about this problem on the internet, I found this site:
  
http://www.bunkerhollow.com/blogs/matt/archive/2011/06/18/zotac-nd22-xbmc-hdmi-audio-configuration-in-ubuntu-11-04.aspx

  The first weird thing is that the mentioned file,
  /usr/share/pulseaudio/alsa-mixer/profile-sets/nvidia.conf, doesn't
  exist on my machine, although I don't know if it were supposed to
  exist.

  After search for some similar file, I fixed the problem change the
  file /usr/share/pulseaudio/alsa-mixer/profile-sets/extra-hdmi.conf. I
  did what was suggested, commented the channel-map line and put a new
  one, as follows:

  ;channel-map = front-left,front-right,rear-left,rear-right,front-center,lfe
  channel-map = front-left,front-right,front-center,lfe,rear-left,rear-right

  I'm reporting this because I think there is a way to detected the sound board 
and do it automatically. My board is:
  00:08.0 Audio device: nVidia Corporation MCP79 High Definition Audio (rev b1)

  Just let me know if you need more info!

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: pulseaudio 1:1.0-0ubuntu3 [modified: 
usr/share/pulseaudio/alsa-mixer/profile-sets/default.conf 
usr/share/pulseaudio/alsa-mixer/profile-sets/extra-hdmi.conf]
  ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
  Uname: Linux 3.0.0-12-generic x86_64
  NonfreeKernelModules: nvidia
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 1.23-0ubuntu3
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: NVidia [HDA NVidia], device 0: ALC888 Analog [ALC888 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  htpc       1727 F.... pulseaudio
  Card0.Amixer.info:
   Card hw:0 'NVidia'/'HDA NVidia at 0xfae78000 irq 20'
     Mixer name : 'Nvidia MCP79/7A HDMI'
     Components : 'HDA:10ec0888,10eca113,00100001 
HDA:10de0007,10de0101,00100100'
     Controls      : 19
     Simple ctrls  : 9
  Date: Tue Oct 25 13:34:42 2011
  InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 
(20100816.1)
  SourcePackage: pulseaudio
  UpgradeStatus: Upgraded to oneiric on 2011-10-14 (11 days ago)
  dmi.bios.date: 01/12/2010
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 080015
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: To be filled by O.E.M.
  dmi.board.vendor: To be filled by O.E.M.
  dmi.board.version: To be filled by O.E.M.
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr080015:bd01/12/2010:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnTobefilledbyO.E.M.:rnTobefilledbyO.E.M.:rvrTobefilledbyO.E.M.:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: To Be Filled By O.E.M.
  dmi.product.version: To Be Filled By O.E.M.
  dmi.sys.vendor: To Be Filled By O.E.M.

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