Qjacktl is not needed to run JACK, you can run it from command line, something like
Anyway, it is up to you to figure out, I can only give you my story.
/usr/bin/jackd -dfirewire -r48000 -p128 -n3
I've purged pulseaudio-jack-sink it tends to bug JACK.
I've turned off pulseaudio, I don't need it, and it can give trouble. You can do it with this command:
I've turned off JACK Dbus in Qjacktl settings, it tends to bug JACK.
echo "autospawn = no" > ~/.pulse/client.conf && pulseaudio -k
Now, I run FA-66 on three different desktops and one laptop. On desktops I've use Ubuntu Studio 12.04, on laptop a had to use AVLinux because of IRQ issues (VGA card shares same IRQ as firewire controler) and overall laptop strenght.
For those three desktops I've had different experiences. On two it worked fine, even with one that has IRQ issue. On the third one I had following problems:
- JACK2 bug it self and wont start with firewire
- card won't work if not powered up before OS boots
I've resolved 'em by instaling JACK1 and turning on card before OS boots.
So, here is the summary of my story:
- purged pulseaudio-jack-sink
- turned off pulseaudio
- turned off JACK Dbus
- installed JACK1
- powering up card before OS boots
You can try AVLinux Live and see how it works. It is more optimised (for audio) than UStudio.
I've didn't mentioned, but it is obvius that you have to use the same samplerate you have set on the card.