As it was explained to me, it's possible to construct a Firewire device that "loops back" #4, providing access to the RAM of the machine that originated the requests.
-- use /dev/video1394, not /dev/raw1394 https://launchpad.net/bugs/6290 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs