Public bug reported:

Have had ac3 passthrough working before, is it possibly not happening
because of the "lowlatency" kernel offered in ubuntu-studio?

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: alsa-base 1.0.25+dfsg-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-23.31-lowlatency 3.2.14
Uname: Linux 3.2.0-23-lowlatency x86_64
NonfreeKernelModules: fglrx
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu13
Architecture: amd64
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xfbff8000 irq 53'
   Mixer name   : 'Realtek ALC888'
   Components   : 'HDA:10ec0888,1458a002,00100001'
   Controls      : 45
   Simple ctrls  : 20
Card1.Amixer.info:
 Card hw:1 'Generic'/'HD-Audio Generic at 0xfb9fc000 irq 54'
   Mixer name   : 'ATI R6xx HDMI'
   Components   : 'HDA:1002aa01,00aa0100,00100200'
   Controls      : 6
   Simple ctrls  : 1
Card1.Amixer.values:
 Simple mixer control 'IEC958',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
Card2.Amixer.info:
 Card hw:2 'Generic_1'/'HD-Audio Generic at 0xfbafc000 irq 55'
   Mixer name   : 'ATI R6xx HDMI'
   Components   : 'HDA:1002aa01,00aa0100,00100200'
   Controls      : 6
   Simple ctrls  : 1
Card2.Amixer.values:
 Simple mixer control 'IEC958',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
Date: Sat Sep 29 12:03:27 2012
InstallationMedia: Ubuntu-Studio 12.04.1 "Precise Pangolin" - Release amd64 
(20120818)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_CA:en
 PATH=(custom, no user)
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:Intel successful
Symptom_Card: Built-in Audio - HDA Intel
Symptom_Jack: Orange SPDIF Out, Rear
Symptom_PulsePlaybackTest: PulseAudio playback test successful
Symptom_Type: No sound at all
Title: [P55A-UD3, Realtek ALC888, Orange SPDIF Out, Rear] No sound at all
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/10/2010
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F11
dmi.board.name: P55A-UD3
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: 
dmi:bvnAwardSoftwareInternational,Inc.:bvrF11:bd08/10/2010:svnGigabyteTechnologyCo.,Ltd.:pnP55A-UD3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnP55A-UD3:rvr:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: P55A-UD3
dmi.sys.vendor: Gigabyte Technology Co., Ltd.

** Affects: alsa-driver (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug precise

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https://bugs.launchpad.net/bugs/1058742

Title:
  [P55A-UD3, Realtek ALC888, Orange SPDIF Out, Rear] No sound at all

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