You need to modify you xorg.conf to emulation a monitor.
  {{Code|cd /etc/X11/  nano xorg.conf}}       :save it as xorg.conf.bak  {{Code|nano xorg.conf}}       :replace everything with
       Section "Monitor"
  save and close xorg.conf
  {{Code|nano /boot/grub/grub.conf}}        :save it as grub.conf.bak  {{Code|nano /boot/grub/grub.conf}}        :add above title Fedora
      GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset"