[linux-audio-user] Jack problem

[Christophe Vescovi]

Hi all,
I'm running Mandrake 9.1 with multimedia kernel and applications that 
come mostly from thacs RPMS.
I have just download jack 0.80.0, qjackctl (great tool !!) and when 
starting jack with -R option I get the error message : "cannot lock down 
memory for RT thread".
Even with this error rosegarden work fine when using only the wavetable 
synth of my sblive (no xruns, even under KDE, switching windows or doing 
other nasty things that usually cause xruns).
The problem is that I cannot connect softsynth to jack (I get the same 
RT thread error), I have tried with ams --jack and zynaddsubfx.
I have seen on list archive several users having the same problems but 
no clear answer on the reason of the problem ....

Thanks,
Christophe