My first move would be to change to 6.2.1 or 6.3. 6.2 has known pronlems with the kernel, possibly necessitating full kernel recompile for module preparation. (I had to do that.)

In a case of unknown hardware/software combinations, I would probably not have started with Knoppix at all, but rather used a distro known to work in actual case. But, if a setup works under Debian, chances are quite good you can get in to work with Knoppix. Google for experiences with your exact Pinnacle model (I don't think they are all created equal, Linux-wise).