Jaunty Alpha 5 and linux-rt (ppa)

[alex stone]

On Sun, Mar 8, 2009 at 10:54 AM, Asmo Koskinen <asmo.koskinen at arkki.info>wrote:

> 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.
>
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Asmo,
do you need capture ports?
And would 3 periods work better than 2?

Alex.



-- 
Parchment Studios (It started as a joke...)
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