Interesting development. I seem to have solved my original problem by simply switching to a &quot;low latency&quot; kernel as opposed to the default &quot;preempt&quot; one. This happened because I decided to reinstall KXStudio (no loss as I hadn&#39;t done much with it yet) and opted to install a low latency kernel as well as a the default preempt one. I booted to the &quot;low latency&quot; kernel, got audio through my firewire, then turned it off without stopping or restarting Jack, waiting a minute or 2, and hey presto - audio back through my onboard soundcard. I do still need to &#39;force restart&#39; jack to get it to recognise my firewire device after I&#39;ve turned it on for the first time, but at least half the (non) problem is solved (not really much of a problem anyway).<br>
<br>I thought this might help someone else looking into the same issue. Either way, thanks to everyone who offered advice.<br><br>Dan<br>