first what is your graphics card ?
is it an ATI or Nvidia ?
is it a desktop or laptop ?
is it a full card or a built in to the mother broad ?
i log in and start up my screen is scrambled
this is a guess but .. i am thinking you might have a built in ati pseudo-3d chip in the computer ( and it is a laptop ) . But i am only guessing at this point .
also with fedora 10 "system-config-display" needs to be installed . 10 is supposed to do this automatically