Comment 0 for bug 1163638

[Impact]

jackd (jackd2) is unable to start when trying to acquire the same audio device used by pulseaudio. (jackd1 is currently not able to acquire the card through dbus).

Users are often unable to use jack at all, without disabling pulseaudio.

[Test Case]

 * First, make sure a pulseaudio client is actively playing audio through pulseaudio
 * Start qjackctl.
 * Select the same device that pulseaudio is using.
 * Start jack. Sometimes it takes a few attempts for the bug to appear. Eventually, jack will not start, and an error message like this will appear:

ATTENTION: The playback device "hw:0" is already in use. Please stop the application using it and run JACK again

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: pulseaudio 1:1.1-0ubuntu15.2
ProcVersionSignature: Ubuntu 3.2.0-39.41-lowlatency 3.2.39
Uname: Linux 3.2.0-39-lowlatency x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu17.1
Architecture: amd64
Card0.Amixer.info:
 Card hw:0 'SB'/'HDA ATI SB at 0xfe300000 irq 16'
   Mixer name : 'Realtek ALC892'
   Components : 'HDA:10ec0892,1462d693,00100302'
   Controls : 43
   Simple ctrls : 20
Card1.Amixer.info:
 Card hw:1 'M66'/'M Audio Delta 66 at 0xd040, irq 21'
   Mixer name : 'ICE1712 - multitrack'
   Components : ''
   Controls : 60
   Simple ctrls : 38
Card2.Amixer.info:
 Card hw:2 'NVidia'/'HDA NVidia at 0xfe080000 irq 24'
   Mixer name : 'Nvidia GPU 0b HDMI/DP'
   Components : 'HDA:10de000b,10de0101,00100100'
   Controls : 24
   Simple ctrls : 4
Date: Wed Apr 3 02:45:46 2013
InstallationMedia: Ubuntu-Studio 12.04.1 "Precise Pangolin" - Release amd64 (20120818)
MarkForUpload: True
ProcEnviron:
 LANGUAGE=en_US:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: pulseaudio
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/15/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: V1.8
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: 970A-G46 (MS-7693)
dmi.board.vendor: MSI
dmi.board.version: 2.0
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: MSI
dmi.chassis.version: 2.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV1.8:bd06/15/2012:svnMSI:pnMS-7693:pvr2.0:rvnMSI:rn970A-G46(MS-7693):rvr2.0:cvnMSI:ct3:cvr2.0:
dmi.product.name: MS-7693
dmi.product.version: 2.0
dmi.sys.vendor: MSI