Yo,
<...>
If that's the case, just add your user account to
the "audio" group, log
out, and log back in, and with any luck JACK will run in realtime mode just
fine.
Duh, I've made sure I was in the audio group well before posting.
Being in the group doesn't seem to do much. chmod +s jackd appears to
do the trick (although it may not have been a very good idea) - but I
still can't start jack from the GUI.
Cheerio,
Mick.