jaap wrote: > When I try jackstart -d alsa -P hw:0,0 -C hw:0,0,the system > freezes with kernel panic. > If jack is running with -P hw:0,0 ,and try to play sound > with alsaplayer -o jack *.ogg,I get a similar crash. > And when I'm run jack with -C hw:0,1 and then open ardour > after some clicks the system freezes too. Ouch. This looks like an ALSA bug. Please post the output of "lsusb -v" and the kernel panic to the alsa-devel list. Regards, Clemens