I have a few pcs which are used as internet access pc's in the cafe at work. I have recently got some more 2nd hand. They are fujitsu-scenic 860's. They work fine with 3.3 but when I try to boot 3.4 with them they stop at "Looking for CDROM in: /dev/scd0" it will sit there for a while then return "Can't find KNOPPIX filesystem, sorry. Dropping you to a (very limited) shell. Press reset button to quit."

These pc's can also boot slax, morphix, freeduc, feather & dsl with out any problems.

Any ideas?