Seems to be affecting 12.10 as well.
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https://bugs.launchpad.net/bugs/794782
Title:
Sound stops working after a while on 12.04
Status in “pulseaudio” package in Ubuntu:
Confirmed
Bug description:
Binary package hint: pulseaudio
After some random amount of time, sound is lost completely in Natty.
The applications outputting sounds continue to run as normal.
Forcing suspend/resume brings audio back.
ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: pulseaudio 1:0.9.22+stable-queue-24-g67d18-0ubuntu3.1
Uname: Linux 2.6.39-02063901-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: marc 2352 F.... pulseaudio
/dev/snd/pcmC0D0p: marc 2352 F...m pulseaudio
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xf2520000 irq 44'
Mixer name : 'Intel IbexPeak HDMI'
Components : 'HDA:14f15069,17aa2156,00100302
HDA:80862804,17aa21b5,00100000'
Controls : 12
Simple ctrls : 6
Card29.Amixer.info:
Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw
6QHT30WW-1.11'
Mixer name : 'ThinkPad EC 6QHT30WW-1.11'
Components : ''
Controls : 1
Simple ctrls : 1
Card29.Amixer.values:
Simple mixer control 'Console',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [on]
Date: Wed Jun 8 20:41:45 2011
EcryptfsInUse: Yes
ProcEnviron:
LANGUAGE=en_US:en
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: pulseaudio
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/23/2010
dmi.bios.vendor: LENOVO
dmi.bios.version: 6QET52WW (1.22 )
dmi.board.name: 5129CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvr6QET52WW(1.22):bd08/23/2010:svnLENOVO:pn5129CTO:pvrThinkPadX201s:rvnLENOVO:rn5129CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 5129CTO
dmi.product.version: ThinkPad X201s
dmi.sys.vendor: LENOVO
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