very very slow flicker of the screen
im pretty new to linux and dcided to install and get to knwo the system. borroed a book (in norway this is ) and it came with a system derived from red hat. i did the install and everything went ok, untill i was to boot. it was supposed to boot in graphical mode, but it came to ask for user name and password in command line, but before i could write the screen went blank. then after somewhere between 40-60 seconds the screen came back briefly, not enoug for me to type. the balnk again. ive tried installing twice, but still the same, and i have no idea what it can be. so any help on this will pre appreciated.