RT_GROUP_SCHED kernel option makes JACK unusable in Ubuntu Natty

[ailo]

On 12/14/2010 08:06 PM, Alessio Igor Bogani wrote:
> The -lowlatency 2.6.37-8.21~ppa1 kernel have RT_GROUP_SCHED enabled.
> Instead the 2.6.37-9.22~ppa1 one's have RT_GROUP_SCHED disabled.
>
> Anyone could test those?
>
> Ciao,
> Alessio
>

On Natty, 2.6.37-9.22~ppa1, Virtualbox

20:31:48.762 Patchbay deactivated.
20:31:48.897 Statistics reset.
20:31:48.956 ALSA connection change.
Cannot connect to server socket err = No such file or directory
Cannot connect to server socket
jack server is not running or cannot be started
20:31:49.040 ALSA connection graph change.
20:31:58.721 Startup script...
20:31:58.722 artsshell -q terminate
Cannot connect to server socket err = No such file or directory
Cannot connect to server socket
jack server is not running or cannot be started
sh: artsshell: not found
20:31:59.140 Startup script terminated with exit status=32512.
20:31:59.141 JACK is starting...
20:31:59.143 /usr/bin/jackd -dalsa -dhw:0 -r44100 -p2048 -n2
20:31:59.196 JACK was started with PID=1509.
no message buffer overruns
no message buffer overruns
jackdmp 1.9.7
Copyright 2001-2005 Paul Davis and others.
Copyright 2004-2010 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
control device hw:0
control device hw:0
audio_reservation_init
Acquire audio card Audio0
creating alsa driver ... hw:0|hw:0|2048|2|44100|0|0|nomon|swmeter|-|32bit
control device hw:0
Using ALSA driver ICH running on card 0 - Intel 82801AA-ICH with 
STAC9700,83,84 at irq 5
configuring for 44100Hz, period = 2048 frames (46.4 ms), buffer = 2 periods
ALSA: final selected sample format for capture: 16bit little-endian
ALSA: use 2 periods for capture
ALSA: final selected sample format for playback: 16bit little-endian
ALSA: use 2 periods for playback
20:32:01.593 JACK connection change.
20:32:01.595 Server configuration saved to "/home/muse/.jackdrc".
20:32:01.601 Statistics reset.
20:32:01.671 Client activated.
20:32:01.736 JACK connection graph change.

-- 
ailo