Mark Constable <markc(a)renta.net> writes:
  This is an explanantion from kde-multimedia(a)kde.org as
to just
 why it would seem to be a problem...
  The design is basically flawed for desktop audio since it
  delegates real-time low-latency work loads through unix
  pipes to the audio applications. You cannot expect all
  audio applications to run real-time and you can not expect
  users to apply custom patches that allow jack to hand out
  real-time privileges. 
For the record: this problem is finally solved in recent 2.6.12 kernel
sources, which now allow realtime privilege assignment via rlimits.
Once mainstream distributions add the necessary PAM and shell patches
to go with that, *no* custom patches will be required for handing out
realtime privileges.
--
  joq