qjackctl realtime question

[Hartmut Noack]

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jk at jasonkahn.net schrieb:

looks like your /etc/security/limits.conf is not set properly. An
Upgrade to studio seems to fail to set this, the install from DVD does
this OK. This file needs to have the following 3 lines at its end:

@audio          -       rtprio  99
@audio          -       memlock 860000
@audio          -       nice    -10


and you have to be in group audio of course ;-)

good luck;-)

HZN


> hello
> 
> i am trying to use qjackctl with the realtime option checked, so far
> with no luck.
> 
> i get the following information in the messages window:
> 
> 08:36:06.348 Patchbay deactivated.
> 08:36:06.358 Statistics reset.
> JACK tmpdir identified as [/dev/shm]
> 08:36:06.424 MIDI connection graph change.
> 08:36:06.611 MIDI connection change.
> 08:38:45.061 Startup script...
> 08:38:45.061 artsshell -q terminate
> JACK tmpdir identified as [/dev/shm]
> can't create mcop directory
> Link points to "/tmp/ksocket-jason"
> 08:38:45.547 Startup script terminated with exit status=256.
> 08:38:45.547 JACK is starting...
> 08:38:45.547 /usr/bin/jackd -R -dalsa -dhw:0 -r44100 -p512 -n3 -P -m -S
> 08:38:45.548 JACK was started with PID=5899 (0x170b).
> jackd 0.103.0
> Copyright 2001-2005 Paul Davis and others.
> jackd 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 compiled with System V SHM support.
> cannot use real-time scheduling (FIFO at priority 10) [for thread
> -1210570048, from thread -1210570048] (1: Operation not permitted)
> cannot create engine
> 08:38:45.651 JACK was stopped successfully.
> 08:38:45.651 Post-shutdown script...
> 08:38:45.651 killall jackd
> jackd: no process killed
> 08:38:45.858 Post-shutdown script terminated with exit status=256.
> 08:38:47.575 Could not connect to JACK server as client. Please check
> the messages window for more info.
> JACK tmpdir identified as [/dev/shm]
> 
> my set-up in qjackctl is:
> server path: /usr/bin/jack
> driver: alsa
> frames/period: 512
> sample rate: 44100
> periods/buffer/3
> interface: (default)
> dither: none
> audio: playback only
> 
> i am using kernel 2.6.22-14-rt on a lenovo t61 laptop with hda intel or
> AD198x Analog sound cards.
> qjackctl version 0.2.22
> alsa-base version 1.0.14-1
> 
> i'm not really getting any x-runs with my settings, but i figured since
> i am running the realtime kernel i should also be able to use this with
> qjackctl.
> 
> thanks in advance for any help!
> 
> jason
> 
> 

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