cd /etc/X11/
  nano xorg.conf
         save it as xorg.conf.bak
  nano xorg.conf
            replace everything with
            Section "Monitor"                      Identifier "Monitor0"                      HorizSync 31-81                      VertRefresh 56-75            EndSection
           Section "Device"                      Identifier "Card0"                      Driver "vesa"           EndSection
           Section "Screen"                      Identifier "Screen0"                      Device "Card0"                      Monitor "Monitor0"           EndSection
  save and close xorg.conf
  nano /boot/grub/grub.conf
           save it as xorg.conf.bak
  nano /boot/grub/grub.conf
               add above title Fedora        GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset"
Reboot