[LAU] jack/firewire weirdness - missing input ports and no sound

Hi I'm running arch linux with a edirol FA66 firewire soundcard. Sometimes when I start qjackctl only 2 (and not 6 as normal) input ports show up in qjackctl's connections for the soundcard. When this happens I cannot get any sound from the soundcard, and so far the only solution I found to work is to reboot the machine, in which case it usually comes back up ok. Anyone else experienced this? Any ideas what could be the problem (or how I figure out what the problem is) or how to solve it? Jack is jackdmp 1.9.2 and my kernel is 2.6.31-rt. [atte@vestbjerg ~]$ jackd --version jackdmp 1.9.2 [atte@vestbjerg ~]$ uname -r 2.6.31-rt -- Atte http://atte.dk http://modlys.dk http://virb.com/atte