Hi Yvan, > 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). Which firewire stack are you using? http://www.ffado.org/?q=node/1316 Cheers! Daniel