Arch Linux

funkmuscle

Member

Registered: 2006-02-09

Posts: 534

jack issues

hey, does anyone know how to resolve this? I've searched the forum and no one has had this issue.
I've installed kernel26rt-2.6.26.8_rt16 and now jack olny runs as root in realtime.
limits.conf is set correctly because I had no issue with other rt kernels running in realtime.
The Arch vanilla kernel, the latest let's me run qjackctl in realtime as regular user.

This is what happens with the latest rt kernel and jack:

ok, this is strange. I can run jackd in realtime with vamilla kernel but now with the rt, I need to run it as root????
never hard that issue with the earlier rt kernel.

$ jackd -R -P89 -dalsa -dhw:0 -r48000 -p128 -n2
jackd 0.116.2
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 -1210726720, from thread -1210726720] (1: Operation not permitted)
cannot create engine

sudo jackd -R -P89 -dalsa -dhw:0 -r48000 -p128 -n2
jackd 0.116.2
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.
loading driver ..
apparent rate = 48000
creating alsa driver ... hw:0|hw:0|128|2|48000|0|0|nomon|swmeter|-|32bit
control device hw:0
configuring for 48000Hz, period = 128 frames (2.7 ms), buffer = 2 periods
ALSA: final selected sample format for capture: 32bit integer little-endian
ALSA: use 2 periods for capture
ALSA: final selected sample format for playback: 32bit integer little-endian
ALSA: use 2 periods for playback

See, it runs as root only. This has never happened before except this kernel.
Any help?

Fackamato

Member

Registered: 2006-03-31

Posts: 579

Re: jack issues

Try the updated package, jack works fine here! http://aur.archlinux.org/packages.php?ID=11364

Ranguvar

Member

Registered: 2008-08-12

Posts: 2,549

Re: jack issues

Wild guess, very likely wrong, but is your user in the audio group? No experience, just guessing