I have a system (Knoppix 3.7) which was working fine but after a dirty shutdown (power cut) won't start KDE. It goes through most of the boot process and gives me a (command line) login prompt but that's it.

I can certainly run things from the command prompt so I was wondering if there is a way to reset the 'broken' system? Or to manually start KDE and then shutdown cleanly?

Any tips would be gratefully received.

Many thanks,
Alan Searle.