Jaunty Alpha 5 and linux-rt (ppa)

[Asmo Koskinen]

Eric Hedekar kirjoitti:

> On Sat, Mar 7, 2009 at 2:12 PM, Asmo Koskinen <asmo.koskinen at arkki.info 
> <mailto:asmo.koskinen at arkki.info>> wrote:
> 
>     cannot use real-time scheduling (FIFO at priority 10) [for thread
>     -1211418944, from thread -1211418944] (1: Operation not permitted)
>     cannot create engine
> 
> Hmm, strange.  When you boot into the vanilla kernel, do you get this 
> same error?

No - when I use it without -R option. Jackd works without -R, but then 
there is lots of xruns, when you play with Ardour2.

1.
studio at ubuntu-studio:~$ uname -a
Linux ubuntu-studio 2.6.28-8-generic #28-Ubuntu SMP Thu Mar 5 21:49:36 
UTC 2009 i686 GNU/Linux
studio at ubuntu-studio:~$

2.
studio at ubuntu-studio:~$ /usr/bin/jackd -R -dalsa -dhw:0 -r44100 -p256 -n2
no message buffer overruns
jackd 0.116.1
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 
-1212401984, from thread -1212401984] (1: Operation not permitted)
cannot create engine
studio at ubuntu-studio:~$

3.
studio at ubuntu-studio:~$ /usr/bin/jackd -dalsa -dhw:0 -r44100 -p256 -n2
no message buffer overruns
jackd 0.116.1
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 = 44100
creating alsa driver ... hw:0|hw:0|256|2|44100|0|0|nomon|swmeter|-|32bit
control device hw:0
configuring for 44100Hz, period = 256 frames (5.8 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

**** alsa_pcm: xrun of at least 0.777 msecs
**** alsa_pcm: xrun of at least 0.576 msecs
**** alsa_pcm: xrun of at least 5.540 msecs
**** alsa_pcm: xrun of at least 0.118 msecs
**** alsa_pcm: xrun of at least 2.678 msecs
**** alsa_pcm: xrun of at least 6.053 msecs

4.
studio at ubuntu-studio:~$ ardour2
Ardour/GTK 2.7.1
    (built using 4296 and GCC version 4.3.3)
----

So rt-linux is still broken, maybe some day.

Only stable Studio with rt-linux is Hardy.

Best Regards Asmo Koskinen.