[Jack-Devel] Jack on Raspberry PI 2 (Ron)

[Ron]

Hi,
(I hope I am using email correctly.  This is the first time I have used 
an email list such as this)

First, let me say thanks to everyone that responded.  The web page link 
really helped.  I have not investigated installing the Raspberry repo of 
jack as of yet.  I will look into that a bit later.   For now I will 
stick with using the source I have from the jack website.

OK,  success (sort of).
I changed the shared memory size (/dev/shm) to 128M.  Now the jackd 
server starts and stay running.  However when using qjackctl I still 
receive the cannot lock memory message however as I said the server 
actually stays running.  Jackd message output:

07:36:18.155 Patchbay deactivated.
07:36:18.177 Statistics reset.
07:36:18.206 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
07:36:18.235 ALSA connection graph change.
07:36:20.455 JACK is starting...
07:36:20.458 /usr/local/bin/jackd -r -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
07:36:20.530 JACK was started with PID=2680.
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 non-realtime mode
Cannot lock down 82278944 byte memory area (Cannot allocate memory)
creating alsa driver ... hw:0|hw:0|1024|2|48000|0|0|nomon|swmeter|-|32bit
control device hw:0
ALSA: Cannot open PCM device alsa_pcm for capture. Falling back to 
playback-only mode
configuring for 48000Hz, period = 1024 frames (21.3 ms), buffer = 2 periods
ALSA: final selected sample format for playback: 16bit little-endian
ALSA: use 2 periods for playback
07:36:22.657 JACK connection change.
07:36:22.667 Server configuration saved to "/home/ron/.jackdrc".
07:36:22.670 Statistics reset.
07:36:22.688 Client activated.
07:36:22.701 JACK connection graph change.
Cannot lock down 82278944 byte memory area (Cannot allocate memory)


BUT if I start jackd via a terminal session (cygwin terminal) and enter:

/usr/local/bin/jackd -r -dalsa -dhw:0 -r48000 -p1024 -n2
jackd responses with:

ron at squireoaksfarm-radio ~/Desktop $ /usr/local/bin/jackd -r -dalsa 
-dhw:0 -r48000 -p1024 -n2
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 non-realtime mode
creating alsa driver ... hw:0|hw:0|1024|2|48000|0|0|nomon|swmeter|-|32bit
control device hw:0
ALSA: Cannot open PCM device alsa_pcm for capture. Falling back to 
playback-only mode
configuring for 48000Hz, period = 1024 frames (21.3 ms), buffer = 2 periods
ALSA: final selected sample format for playback: 16bit little-endian
ALSA: use 2 periods for playback

As you can see the jackd server does NOT report  can not lock memory.  
Why is this?

Also ASLA is reporting it can not open the device for capture.  Why is this?

Sorry, but I'm really new to sound and sound device management on 
Linux.  My ultimate goal is to get an application running that requires 
jack and this is my first stumbling block on on that path.

73
Ron / W4MMP

On 4/17/2015 06:00, jack-devel-request at lists.jackaudio.org wrote:
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> Today's Topics:
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>     1. Jack on Raspberry PI 2 (Ron)
>     2. running jackd from rc.local (Athanasios Silis)
>     3. Re: running jackd from rc.local (Jeremy Jongepier)
>     4. Re: Jack on Raspberry PI 2 (Jeremy Jongepier)
>     5. Re: running jackd from rc.local (Athanasios Silis)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 16 Apr 2015 21:20:46 -0400
> From: Ron <w4mmp at aol.com>
> To: jack-devel at lists.jackaudio.org
> Subject: [Jack-Devel] Jack on Raspberry PI 2
> Message-ID: <55305FEE.4050904 at aol.com>
> Content-Type: text/plain; charset="utf-8"; Format="flowed"
>
> Hello,
> Sorry about that.  My mistake.
>