I do not own such hardware but I would try Knoppix V 6.2.1 with the cheatcode xmodule=radeonhd. Support for Mobility Radeon 4570 (M92) was added in the radeonhd driver 1.3.0 although it is called experimental http://cgit.freedesktop.org/xorg/dri...d/plain/README. I do not know whether radeonhd driver 1.3.0 was included in Knoppix 6.2.0.