Also, are you on 64bit or 32bit linux?
The "aaaa" was a bogus chain, you need to read the one which is displayed by lsusb . In my case it's 615d in normal mode. If the flash and Fastboot modes give you the same output, that's no problem, just use the chain they give you.
The asterisk thing could mean that that rule is valid for any product ID, but I've never used it so I sticked to my known method.