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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Just a respectful and gentle reminder here, that Cory did give us plenty of
notice about the daunting challenges in building an RT kernel for UBstudio
Jaunty. Lot of big changes in the vanilla kernel, and only so many hands on
deck, to achieve the Ubstudio end result we'd like to see.

Hardy 64bit works fine here though.

Regards,

Alex.



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