[arch-dev-public] Interesting post-install messages (jack-audio-connection-kit and ardour)

Jason Chu jason at archlinux.org
Mon Feb 25 13:52:25 EST 2008


I updated my machine and saw these two post-install messages back to back:

( 1/40) upgrading jack-audio-connection-kit         [#####################################################################################] 100%

 --> It is recommended to use qjackctl as a controlling frontend for the
 --> audio server. The extended rights for realtime capabilities can be
 --> granted based on groups or a per user base in
 -->               /etc/security/limits.conf

 --> The audio server comes with a daemon script that runs it as root.
 --> Configuration happens in /etc/conf.d/jack-audio-connection-kit and is
 --> documented there.
 --> NOTE: Running jack as root to enable realtime capabilities isn't
 --> needed any longer.

( 2/40) upgrading ardour                            [#####################################################################################] 100%

-->  You need to have jack running before you start ardour. There are two ways
-->  to have ardour and jack running:
-->   - as root with realtime capabilities
-->   - as oridinary user without realtime capabilities
-->  You have to make sure, that ardour and jack run as the same user - mixing
-->  up fails.
-->  RUNNING AS ROOT IS ALWAYS A RISK FOR THE SECURITY!
-->  Also consider to use qjackctl to control jack. Note, that also qjackctl
-->  has to run as the same user as ardour. Don't forget to check out 
-->  qjackctl's patchbay and read the docs from http://ardour.org !


So which one is it?  Do I have to run jack and ardour as root or can I not?
I'm pretty sure the jack message is more recent than the ardour one, so
running jack non-root will work fine with ardour and still have realtime
capabilities.  Maybe we need to update the ardour post-install message.

I just had a little laugh reading them both.

Jason
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