Public bug reported:
I've done some troubleshooting on this and have narrowed the problem
down to a kernel update. If I boot my system with kernel 2.6.35-24, the
digital audio optical output (identified as IEC958 in the sound
preferences panel) functions properly.
After running a kernel update from update manager (2.6.35-25) the output
stopped working. I have also tried the kernel update in proposed
(2.6.35-26) and the output still does not work.
Something in the change from 35-24 to 35-25 seems to have made this one
particular output not function. I'd like to point out that HDMI digital
audio output does still seem to function properly on all kernel
versions, it is only the optical output that has been affected.
This is Ubuntu 10.10, 64 bit, on a system using an Intel DH57JG
motherboard. I believe other systems may be affected after reading some
posts on the Ubuntu Forums with similar issues.
ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: alsa-base 1.0.23+dfsg-1ubuntu4
ProcVersionSignature: Ubuntu 2.6.35-26.46-generic 2.6.35.10
Uname: Linux 2.6.35-26-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: matt 1710 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xf0420000 irq 44'
Mixer name : 'Intel IbexPeak HDMI'
Components : 'HDA:10ec0889,80860035,00100004
HDA:80862804,80860035,00100000'
Controls : 42
Simple ctrls : 22
Date: Tue Feb 1 19:31:18 2011
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
PackageArchitecture: all
ProcEnviron:
LANG=en_US.utf8
SHELL=/bin/bash
SelectedCard: 0 Intel HDA-Intel - HDA Intel
SourcePackage: alsa-driver
Symptom: audio
Title: [Realtek ALC889] ALSA test tone not correctly played back
dmi.bios.date: 12/19/2010
dmi.bios.vendor: Intel Corp.
dmi.bios.version: JGIBX10J.86A.0625.2010.1219.2132
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: DH57JG
dmi.board.vendor: Intel Corporation
dmi.board.version: AAE70930-302
dmi.chassis.type: 2
dmi.modalias:
dmi:bvnIntelCorp.:bvrJGIBX10J.86A.0625.2010.1219.2132:bd12/19/2010:svn:pn:pvr:rvnIntelCorporation:rnDH57JG:rvrAAE70930-302:cvn:ct2:cvr:
** Affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug maverick
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https://bugs.launchpad.net/bugs/711598
Title:
IEC958 output stopped functioning after kernel update
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