Hi Lee, Thanx for the tips. I'm can't do anything right now coz I need a few packages to continue and I'm stuck in a pure64/debian-pure64 version-skew right now. In the meantime I compiled 2.6.12-rc2 with realtime-lsm module according to realtime-lsm/INSTALL and have it running in 64bit. Now sorting out JACK and segfault stuff... I'll have another go at the RT-rlimits/PAM approach when I can get the packages I need.. Cheers Norv