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Machine answers "All files OK" but, after announcing that graphic interface is loading only a black screen appears.
And no response is got from CTRL ALT F2.

Typing "keyboard=es" (without apostrophes) in boot it starts, asks for pass, informs of the loading of GUI and then...nothing! No penguin, no compiz, only a black screen until the machine is...

I'm using right now version 7.4 on a 16 Gb USB pendrive which I made with pendrivelinux from KNOPPIX_V7.4.0DVD-2014-08-01-EN.iso a few hours ago. It works as long as I don't try to use any cheatcode...