I'm trying to run Knoppix 7.4.2 from USB key; my laptop won't boot anything from DVD (efi problems) . It runs OpenSuSE and Fedora (and Windows) just fine; only Knoppix won't run graphics. I just tried installing the AMD proprietary Radeon driver on my USB key, but that resulted in a USB key which booted but made no progress after loading the ramdisk. Knoppix 7.5 isn't public yet (unless you are in Germany and can get the magazine). Looks like I need to go borrow another PC to remake my USB key after the breakage ...