Jaunty Alpha 5 and linux-rt (ppa)
Asmo Koskinen
asmo.koskinen at arkki.info
Sat Mar 7 22:12:27 GMT 2009
I installed Jaunty Studio Alpha 5 (update&upgrade) and then installed
only linux-rt from ppa.
https://launchpad.net/~ubuntustudio-dev/+archive/ppa
I can use/play M-Audio Keystation 49e with jackd and qsynth, but only as
root/sudo user.
http://www.arkki.info/howto/Ubuntu_Studio/Jaunty/Kuvakaappaus.png
If I try same as a user, I get this. I have modified all necessary files.
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
-1211418944, from thread -1211418944] (1: Operation not permitted)
cannot create engine
studio at ubuntu-studio:~$
----
"Interview: the return of the realtime preemption tree
By Jonathan Corbet February 16, 2009"
http://lwn.net/Articles/319544/
Best Regards Asmo Koskinen.
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