Originally Posted by JaXXoN
Maybe the attached one is doing it for you (but I guess you
need to do some minor fine tuning).
Oops, I have forgotten to add the modeline to the monitor section:
ModeLine "3840x1200" 308.00 3840 3904 3968 4160 1200 1203 1213 1235 +HSync +VSync
I have attached the updated xorg.conf