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FFADO test and diagnostic utility
Part of the FFADO project -- www.ffado.org
Version: 2.999.0-
(C) 2008, Daniel Wagner, Pieter Palmers
This program comes with ABSOLUTELY NO WARRANTY.
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=== 1394 PORT 0 ===
Node id GUID VendorId ModelId Vendor - Model
0 0x0000000000000000 0x00000000 0x00000000 Linux Firewire -
no message buffer overruns

I presume you've installed the "standard" FFADO from the Ubuntu repo?

I've had trouble with JACK1 and that. I'm currently running JACK2 (version 1.9.6)
from "Frasten"'s PPA.

FFADO from the TangoStudio repo, version 2.0.1 - svn1856.

That combo runs fine, but not at extreme low-lat. (I've always had better experience with JACK 1 for < 10 ms lat)

Cheers, -Harry