ati laptop display

[don fisher]

I have a dell 1721 laptop with an Radeon X1200 Ati controller. I am 
using ATI's ati-driver-installer-8.443.1-x86.x86_64. The laptop has the 
correct display resolution of 1920X1200. But the output port appears to 
be at 1600X1200.

Can anybody assist me is setting the output port to the same resolution 
as displayed on the internal LCD screen? xorg.conf attached.

Thanks
don

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