I'm trying to run Knoppix on a Toshiba Skullcandy laptop (2015 model). It has an AMD A8 processor and Radeon graphics. 'knoppix64 no3d' causes it to boot OK and get to the graphics screen, but after a few seconds everything freezes and only a forced power-off works. Does anyone have Knoppix working on this kind of system ? Am I missing a cheatcode, and if so which one ?
Things run OK if I boot with 'knopppix64 2', but obviously I don't get a GUI that way and that's no use to me.
'knoppix64 no3d failsafe' also hangs after a few seconds.

Thanks for all help anyone can give !

Chris Ward