I installed Ubuntu 12.04 after Windows failed me and Samsung got a bit pissy about providing any help. I then upgraded to 12.10 after a week or two and suddenly my external USB devices no longer work. The same devices I plugged in are no longer recognised. As I say, I'm only a user of Ubuntu for a fortnight, so any advice and directions to very simple instructions, would be appreciated greatly. I've seen this asked elsewhere, but the advice was to ask again if you needed clarification.