I'm also hitting this bug, with an up-to-date 12.04 64bit install.
Sometimes sound works, but about half the time as soon as the first
application tries to play sound (I'm testing with Rhythmbox and the
"Test sound" button in the sound settings), the logs get bombed by
hundereds of lines like:
[ 525.553067] ca0106: unstable DMA pointer!
usually after a second or two the machine locks up and I have to hard-
reset it.
I'm playing sound via the IEC958 optical out. This only started
happening in the last month or so.
** Changed in: alsa-driver (Ubuntu)
Status: Expired => Confirmed
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https://bugs.launchpad.net/bugs/1107126
Title:
[CA0106 - CA0106, playback] unstable DMA pointer and No sound at all
Status in “alsa-driver” package in Ubuntu:
Confirmed
Bug description:
I just installed Ubuntu 12.04.LTS. Everything was working fine until I
opened the Sound settings to see why my Youtube audio was only static.
I was able to watch streaming video on Hulu without problem. It's a
very old system, but a brand new sound card. Now, no sound at all, not
testing, not at startup, nothing. I forced an alsa reload, but nothing
changed.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: alsa-base 1.0.25+dfsg-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-36.57-generic-pae 3.2.35
Uname: Linux 3.2.0-36-generic-pae i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu17.1
Architecture: i386
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: doc 6683 F.... pulseaudio
doc 9556 F.... alsamixer
/dev/snd/pcmC0D0c: doc 6683 F...m pulseaudio
Card0.Amixer.info:
Card hw:0 'CA0106'/'Audigy SE [SB0570] at 0xcca0 irq 16'
Mixer name : 'CA0106'
Components : ''
Controls : 35
Simple ctrls : 18
Date: Sun Jan 27 12:03:57 2013
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release i386
(20120817.3)
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:CA0106 failed
Symptom_Card: CA0106 Soundblaster - CA0106
Symptom_DevicesInUse:
6683 9556 6683 doc F.... pulseaudio
doc F.... alsamixer
/dev/snd/pcmC0D0c: doc F...m pulseaudio
Symptom_Type: No sound at all
Title: [CA0106 - CA0106, playback] No sound at all
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/25/2005
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A01
dmi.board.name: 0X8582
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 7
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvrA01:bd05/25/2005:svnDellInc.:pnDimension9100:pvr:rvnDellInc.:rn0X8582:rvr:cvnDellInc.:ct7:cvr:
dmi.product.name: Dimension 9100
dmi.sys.vendor: Dell Inc.
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