Originally Posted by CrashedAgain
For your problem, if you look through /etc/init.d/knoppix-autoconfig you will see several lines 'update_progress 20 (or 40or60etc)' This is where the progress bar is being created. It sounds like it may be having trouble configuring X but this is just a guess, so you might try adding "nomkxf86config" to your append=' line in /etc/lilo.conf. This is the same as booting with the nomkxf86config cheatcode. You might also try booting 'interactive' mode.
It is surprising that it would work for a while then quit. It is unlikely that the autoconfig script has changed in any way, it sounds like a hardware detection issue.