Re: [Jack-Devel] Jack on arm hf

> The most common error: you're using a self-compiled jackd and libjack
> but there are some files remaining from distribution's jack packages.
> check /usr/lib/armhf-linux-gnu/jack/ vs /usr/lib/jack/ for example.

Ok, I do have .so files in /usr/lib/jack, but there's no /usr/lib/armhf-linux-gnu dir. Something like that has been my suspicion as well, since I have installed/reinstalled/compiled quite a few times now. Will try a complete system reinstall next week.


> It might also just be missing RT
> privileges and/or related to you not starting jackd manually but let
> supercollider start a temporary jack server...

jackd will start up seemingly fine when started manually. It has RT privileges.

> Can you post the complete log from jack startup? or best a gdb backtrace
> of the crash.

Sorry, I haven't figured out how to do a gdb backtrace (Linux semi-noob here).

This is the output when I start jack manually:

----------------
axel@xlpicuntu:~$ jackd -s -d alsa -d hw:HDMI -r 44100 -p 512
jackdmp 1.9.10
Copyright 2001-2005 Paul Davis and others.
Copyright 2004-2013 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
creating alsa driver ... hw:HDMI|hw:HDMI|512|2|44100|0|0|nomon|swmeter|-|32bit
configuring for 44100Hz, period = 512 frames (11.6 ms), buffer = 2 periods
ALSA: final selected sample format for playback: 16bit little-endian
ALSA: use 3 periods for playback
------------------

Seems fine. Now when I connect jack_simple_client

-----------------
axel@xlpicuntu:~$ jack_simple_client
Cannot lock down 68157440 byte memory area (Cannot allocate memory)
Cannot lock down 2048917504 byte memory area (Cannot allocate memory)
Cannot lock down 25165824 byte memory area (Cannot allocate memory)
You cannot set callbacks on an active client
You cannot set callbacks on an active client
no physical playback ports
axel@xlpicuntu:~$ 
-------------------

When I start sclang and run s.boot:

-------------------
sc3> s.boot
booting 57110
localhost
sc3> Cannot lock down 68157440 byte memory area (Cannot allocate memory)
Cannot lock down 2048917504 byte memory area (Cannot allocate memory)
Cannot lock down 25165824 byte memory area (Cannot allocate memory)
JackDriver: client name is ''
You cannot set callbacks on an active client
You cannot set callbacks on an active client
You cannot set callbacks on an active client
You cannot set callbacks on an active client
You cannot set callbacks on an active client
You cannot set callbacks on an active client
SC_AudioDriver: sample rate = 2890137600.000000, driver's block size = 33554432
SuperCollider 3 server ready.
sc3> ERROR: server failed to start
--------------------------------

Hmm, when I quit SC I do have an scsynth running alongside jackd which is still running (no crash) although it previously said "server failed to start". Weird….

Axel





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