Having used knoppix without problems from CD, I have taken the plunge and installed it to hard disk. Whilst CD operation recognized all my usb devices the hard disk installation won't recognize any ! On boot up I get a series of entries which say " usb_control/bulk_msg:timeout" and in the middle of these enries a line which says"ttys1:lsr safety check engaged" .As a Linux newbie this has me totally baffled. Any pearls of wisdom to offer ?

Update: After trying to configure printer manually I rebooted and hey presto the usb devices are now recognised. Don't quite know how or why unless someone out there is really good ! All I have to do now is make my scanner and zip drive actually work and I'm their !
Update 2: After ploughing through Howto's and other Linux aids I am no nearer solving this problem! Position is that I have 4 devices on a USB hub. A printer,which works fine, a Zip drive and Wireless optical mouse, which are listed in USB view but I can't get to function, and a scanner which I know is compatible with Linux but does not appear anywhere ! - Any help would be gratefully received.
Update 3; All problems resolved except Micrsoft usb Optical mouse. Pointer will only go up and down. Found a workround as follows:-
At text input" modprobe -r usbmouse"(enter) then "modprobe hid ". Mouse then works perfectly but I have to do this on every boot.
Any ideas ?