@Brad, can you please add the line: Option "AccelMethod" "UXA" inside the "Device" section of your /etc/X11/xorg.conf file and then reboot the machine and try again.
@Brad, can you please add the line:
Option "AccelMethod" "UXA"
inside the "Device" section of your /etc/X11/xorg.conf file and then reboot the machine and try again.