cud be something with famebuffer i think...
Tho u dont see anything but he is definatly loading
Wait some seconds, the when u hear he is nomore loading just login
usr
psw
kdm
Then kdm sould normally load and u'll see ur screen
Try to change in LILO then vga=normal ( dont forget to run /sbin/lilo) and normally u should be fine next time tho it wont be very nice to c bit sluggy