hello, this is my first post here. I'm using pure-dyne 9.11 (with kernel 2.6.31-9-rt) and a Presonus Firebox. For some reasons, I cannot use this FW soundcard with jack as I have *a lot* of xruns (1 every 2 or 3 seconds). I asked for help on the puredyne mailing-list but it seems that nobody knows where this problem comes from (it was working perfectly fine with an older puredyne version which was debian-based). I was told to install the package ffado-debus-server but it didn't help. here are my jackd settings: jackd -P 70 -R -P89 -p512 -dfreebob -dhw:0 -r44100 -p1024 -n3 -D in my /etc/security/limits.conf: @audio - rtprio 90 @audio - nice -15 @audio - memlock unlimited I have another usb soundcard which does work fine with jack (and alsa driver) but it has no inputs, etc, it's a pain not to be able anymore to use the Firebox. any help would be greatly appreciated !! cheers, _yvan