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This sound card (Realtek ALC892) is 7.1 channel capable via the digital out
(SPDIF).
However, Ubuntu is not recognizing it as such and on the sound configuration we
can only see the stereo parameters (right and left).
As you can see in the attached picture, the rear and subwoofer parameters are
grayed out, as if the card didn't support it.
I have connected it to a 5.1 amplifier and played a DTS suround file.
Unfortunately the sound coming out is simply stereo. No 5.1 surround.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: alsa-base 1.0.25+dfsg-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-25.40-generic 3.2.18
Uname: Linux 3.2.0-25-generic x86_64
NonfreeKernelModules: fglrx
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu8
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: jabss 1592 F.... pulseaudio
jabss 3738 F.... alsamixer
/dev/snd/controlC0: jabss 1592 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'Generic'/'HD-Audio Generic at 0xfef44000 irq 48'
Mixer name : 'ATI R6xx HDMI'
Components : 'HDA:1002aa01,00aa0100,00100200'
Controls : 6
Simple ctrls : 1
Card0.Amixer.values:
Simple mixer control 'IEC958',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [on]
Card1.Amixer.info:
Card hw:1 'Generic_1'/'HD-Audio Generic at 0xfef40000 irq 16'
Mixer name : 'Realtek ALC892'
Components : 'HDA:10ec0892,18498892,00100302'
Controls : 40
Simple ctrls : 19
Date: Tue Jun 19 00:29:21 2012
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
PackageArchitecture: all
ProcEnviron:
TERM=xterm
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:Generic_1 failed
Symptom_Card: Built-in Audio - HD-Audio Generic
Symptom_Jack: Grey SPDIF Out, Rear
Symptom_Type: Only some of outputs are working
Title: [To Be Filled By O.E.M., Realtek ALC892, Grey SPDIF Out, Rear] Playback
problem
UpgradeStatus: Upgraded to precise on 2012-04-27 (52 days ago)
dmi.bios.date: 02/09/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P1.50
dmi.board.name: A75M-ITX
dmi.board.vendor: ASRock
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.:bvrP1.50:bd02/09/2012:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnA75M-ITX:rvr: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.
** Affects: gnome-control-center (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: amd64 apport-bug precise
--
[ASRock A75M-ITX, Realtek ALC892, Grey SPDIF Out, Rear] Surround output not
working
https://bugs.launchpad.net/bugs/1014897
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