I was trying Feather for a while too on an older laptop with an LCD, to get the cheat code, which i think "vsync=75 is, to work. I would type "knoppix vga=789", thats the cheat code i needed for the GUI to work, otherwise i would just get the command line.
If the vsync doesnt work, i would find the specs of your monitor and google possible cheat codes for it.
After i figured out how to configure it to work with the GUI and i wanted to HD install i never again got the GUI to work, it always froze up on me.
And it could be im way off base and we arnt having the same problem lol.