Public bug reported:

There is a bug in Pulseaudio that makes it hard for jack to grab the audio
device from pulseaudio.
Apperently this bug is fixed in 3.0

There is some methods to get it to work while avaiting the release:
* using the tool pasuspender, like so: pasuspender -- sleep 30
  * turning of pulseaudio autospawn, and killing pulseaudio.

Jackd error output:

Tue Feb 26 20:01:59 2013: Starting jack server...
Tue Feb 26 20:01:59 2013: JACK server starting in realtime mode with priority 10
Tue Feb 26 20:01:59 2013: ERROR: Cannot lock down 82274202 byte memory 
area (Cannot allocate memory)
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
Tue Feb 26 20:01:59 2013: control device hw:0
Tue Feb 26 20:01:59 2013: control device hw:0
Tue Feb 26 20:01:59 2013: ERROR: Failed to acquire device name : 
Audio0 error : Method "RequestRelease" with signature "i" on interface 
"org.freedesktop.ReserveDevice1" doesn't exist

Tue Feb 26 20:01:59 2013: ERROR: Audio device hw:0 cannot be 
acquired...
Tue Feb 26 20:01:59 2013: ERROR: Cannot initialize driver
Tue Feb 26 20:01:59 2013: ERROR: JackServer::Open failed with -1
Tue Feb 26 20:01:59 2013: ERROR: Failed to open server
Tue Feb 26 20:02:00 2013: Saving settings to 
"/home/haaken/.config/jack/conf.xml" ...
20:02:11.229 Could not connect to JACK server as client. - Overall operation 
failed. - Unable to connect to server. Please check the messages window for 
more info.
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
20:10:31.231 D-BUS: JACK server could not be started. Sorry
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
Tue Feb 26 20:10:30 2013: Starting jack server...
Tue Feb 26 20:10:31 2013: JACK server starting in realtime mode with priority 10
Tue Feb 26 20:10:31 2013: ERROR: Cannot lock down 82274202 byte memory 
area (Cannot allocate memory)
Tue Feb 26 20:10:31 2013: control device hw:0
Tue Feb 26 20:10:31 2013: control device hw:0
Tue Feb 26 20:10:31 2013: ERROR: Failed to acquire device name : 
Audio0 error : Method "RequestRelease" with signature "i" on interface 
"org.freedesktop.ReserveDevice1" doesn't exist

Tue Feb 26 20:10:31 2013: ERROR: Audio device hw:0,4 cannot be 
acquired...
Tue Feb 26 20:10:31 2013: ERROR: Cannot initialize driver
Tue Feb 26 20:10:31 2013: ERROR: JackServer::Open failed with -1
Tue Feb 26 20:10:31 2013: ERROR: Failed to open server
Tue Feb 26 20:10:33 2013: Saving settings to 
"/home/haaken/.config/jack/conf.xml" ...
20:10:36.416 Could not connect to JACK server as client. - Overall operation 
failed. - Unable to connect to server. Please check the messages window for 
more info.
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
20:14:37.491 D-BUS: JACK server could not be started. Sorry
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
Tue Feb 26 20:14:37 2013: Starting jack server...
Tue Feb 26 20:14:37 2013: JACK server starting in realtime mode with priority 10
Tue Feb 26 20:14:37 2013: ERROR: Cannot lock down 82274202 byte memory 
area (Cannot allocate memory)
Tue Feb 26 20:14:37 2013: control device hw:0
Tue Feb 26 20:14:37 2013: control device hw:0
Tue Feb 26 20:14:37 2013: ERROR: Failed to acquire device name : 
Audio0 error : Method "RequestRelease" with signature "i" on interface 
"org.freedesktop.ReserveDevice1" doesn't exist

Tue Feb 26 20:14:37 2013: ERROR: Audio device hw:0,4 cannot be 
acquired...
Tue Feb 26 20:14:37 2013: ERROR: Cannot initialize driver
Tue Feb 26 20:14:37 2013: ERROR: JackServer::Open failed with -1
Tue Feb 26 20:14:37 2013: ERROR: Failed to open server
Tue Feb 26 20:14:38 2013: Saving settings to 
"/home/haaken/.config/jack/conf.xml" ...
20:14:41.599 Could not connect to JACK server as client. - Overall operation 
failed. - Unable to connect to server. Please check the messages window for 
more info.
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started

** Affects: jack-audio-connection-kit (Ubuntu)
     Importance: Undecided
         Status: New

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to jack-audio-connection-kit in Ubuntu.
https://bugs.launchpad.net/bugs/1144441

Title:
  Please upgrade to pulseaudio 3.0

Status in “jack-audio-connection-kit” package in Ubuntu:
  New

Bug description:
  There is a bug in Pulseaudio that makes it hard for jack to grab the audio
  device from pulseaudio.
  Apperently this bug is fixed in 3.0

  There is some methods to get it to work while avaiting the release:
  * using the tool pasuspender, like so: pasuspender -- sleep 30
    * turning of pulseaudio autospawn, and killing pulseaudio.

  Jackd error output:

  Tue Feb 26 20:01:59 2013: Starting jack server...
  Tue Feb 26 20:01:59 2013: JACK server starting in realtime mode with priority 
10
  Tue Feb 26 20:01:59 2013: ERROR: Cannot lock down 82274202 byte 
memory area (Cannot allocate memory)
  Cannot connect to server socket err = No such file or directory
  Cannot connect to server request channel
  jack server is not running or cannot be started
  Tue Feb 26 20:01:59 2013: control device hw:0
  Tue Feb 26 20:01:59 2013: control device hw:0
  Tue Feb 26 20:01:59 2013: ERROR: Failed to acquire device name : 
Audio0 error : Method "RequestRelease" with signature "i" on interface 
"org.freedesktop.ReserveDevice1" doesn't exist
  
  Tue Feb 26 20:01:59 2013: ERROR: Audio device hw:0 cannot be 
acquired...
  Tue Feb 26 20:01:59 2013: ERROR: Cannot initialize driver
  Tue Feb 26 20:01:59 2013: ERROR: JackServer::Open failed with -1
  Tue Feb 26 20:01:59 2013: ERROR: Failed to open server
  Tue Feb 26 20:02:00 2013: Saving settings to 
"/home/haaken/.config/jack/conf.xml" ...
  20:02:11.229 Could not connect to JACK server as client. - Overall operation 
failed. - Unable to connect to server. Please check the messages window for 
more info.
  Cannot connect to server socket err = No such file or directory
  Cannot connect to server request channel
  jack server is not running or cannot be started
  20:10:31.231 D-BUS: JACK server could not be started. Sorry
  Cannot connect to server socket err = No such file or directory
  Cannot connect to server request channel
  jack server is not running or cannot be started
  Tue Feb 26 20:10:30 2013: Starting jack server...
  Tue Feb 26 20:10:31 2013: JACK server starting in realtime mode with priority 
10
  Tue Feb 26 20:10:31 2013: ERROR: Cannot lock down 82274202 byte 
memory area (Cannot allocate memory)
  Tue Feb 26 20:10:31 2013: control device hw:0
  Tue Feb 26 20:10:31 2013: control device hw:0
  Tue Feb 26 20:10:31 2013: ERROR: Failed to acquire device name : 
Audio0 error : Method "RequestRelease" with signature "i" on interface 
"org.freedesktop.ReserveDevice1" doesn't exist
  
  Tue Feb 26 20:10:31 2013: ERROR: Audio device hw:0,4 cannot be 
acquired...
  Tue Feb 26 20:10:31 2013: ERROR: Cannot initialize driver
  Tue Feb 26 20:10:31 2013: ERROR: JackServer::Open failed with -1
  Tue Feb 26 20:10:31 2013: ERROR: Failed to open server
  Tue Feb 26 20:10:33 2013: Saving settings to 
"/home/haaken/.config/jack/conf.xml" ...
  20:10:36.416 Could not connect to JACK server as client. - Overall operation 
failed. - Unable to connect to server. Please check the messages window for 
more info.
  Cannot connect to server socket err = No such file or directory
  Cannot connect to server request channel
  jack server is not running or cannot be started
  20:14:37.491 D-BUS: JACK server could not be started. Sorry
  Cannot connect to server socket err = No such file or directory
  Cannot connect to server request channel
  jack server is not running or cannot be started
  Tue Feb 26 20:14:37 2013: Starting jack server...
  Tue Feb 26 20:14:37 2013: JACK server starting in realtime mode with priority 
10
  Tue Feb 26 20:14:37 2013: ERROR: Cannot lock down 82274202 byte 
memory area (Cannot allocate memory)
  Tue Feb 26 20:14:37 2013: control device hw:0
  Tue Feb 26 20:14:37 2013: control device hw:0
  Tue Feb 26 20:14:37 2013: ERROR: Failed to acquire device name : 
Audio0 error : Method "RequestRelease" with signature "i" on interface 
"org.freedesktop.ReserveDevice1" doesn't exist
  
  Tue Feb 26 20:14:37 2013: ERROR: Audio device hw:0,4 cannot be 
acquired...
  Tue Feb 26 20:14:37 2013: ERROR: Cannot initialize driver
  Tue Feb 26 20:14:37 2013: ERROR: JackServer::Open failed with -1
  Tue Feb 26 20:14:37 2013: ERROR: Failed to open server
  Tue Feb 26 20:14:38 2013: Saving settings to 
"/home/haaken/.config/jack/conf.xml" ...
  20:14:41.599 Could not connect to JACK server as client. - Overall operation 
failed. - Unable to connect to server. Please check the messages window for 
more info.
  Cannot connect to server socket err = No such file or directory
  Cannot connect to server request channel
  jack server is not running or cannot be started

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