[Jack-Devel] Jack on Raspberry PI 2

[Jeremy Jongepier]

On 04/17/2015 03:20 AM, Ron wrote:
> Hello,
> 
> I have downloaded, built and installed the latest version of Jack on a
> Raspberry PI 2 running Raspbian (Linux 3.18.11-v7+ #777 SMP PREEMPT).
> 

Hello Ron,

Did you also try with the version from the Raspbian repository? That
package is patched for use on ARM devices.

> ron at squireoaksfarm-radio ~/src/quick2wire-python-api $ jackd --version
> jackdmp 1.9.11
> Copyright 2001-2005 Paul Davis and others.
> Copyright 2004-2014 Grame.
> jackdmp comes with ABSOLUTELY NO WARRANTY
> This is free software, and you are welcome to redistribute it
> under certain conditions; see the file COPYING for details
> jackdmp version 1.9.11 tmpdir /dev/shm protocol 8
> 
> 
> I have been all over the internet trying to find a solution to the
> following error that prevents the jack server from starting (using
> qjackctl):
> 
> 
> 10:31:31.869 Patchbay deactivated.
> 10:31:31.882 Statistics reset.
> 10:31:31.931 ALSA connection change.
> 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
> 10:31:31.961 ALSA connection graph change.
> 10:31:35.651 JACK is starting...
> 10:31:35.653 /usr/local/bin/jackd -dalsa -dhw:0 -r48000 -p1024 -n2
> 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
> 10:31:35.682 JACK was started with PID=9484.
> jackdmp 1.9.11
> Copyright 2001-2005 Paul Davis and others.
> Copyright 2004-2014 Grame.
> jackdmp comes with ABSOLUTELY NO WARRANTY
> This is free software, and you are welcome to redistribute it
> under certain conditions; see the file COPYING for details
> JACK server starting in realtime mode with priority 10
> Cannot lock down 82278944 byte memory area (Cannot allocate memory)
> 10:31:36.022 JACK was stopped successfully.
> 10:31:36.028 JACK has crashed.
> 10:31:37.778 Could not connect to JACK server as client. - Overall
> operation failed. - Unable to connect to serve
> r. 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
> 

How much memory did you allocate to the GPU? You might want to check
here for a workaround:
http://wiki.linuxaudio.org/wiki/raspberrypi#running_jack

> 
> I have tried to start the sever with the "--no-mlock" option.
> Here are the contents of audio.conf
> ron at squireoaksfarm-radio /etc/security/limits.d $ more audio.conf
> # Provided by the jackd package.
> #
> # Changes to this file will be preserved.
> #
> # If you want to enable/disable realtime permissions, run
> #
> #    dpkg-reconfigure -p high jackd
> 
> @audio   -  rtprio     95
> @audio   -  memlock    unlimited
> #@audio   -  nice      -19
> 
> The user "ron" is a member of the audio group.

Jeremy

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