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ati laptop display



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

# Xorg configuration created by system-config-display

Section "ServerLayout"
	Identifier     "single head configuration"
	Screen      0  "aticonfig-Screen[0]" 0 0
	InputDevice    "Keyboard0" "CoreKeyboard"
EndSection

Section "Files"
EndSection

Section "Module"
EndSection

Section "InputDevice"
	Identifier  "Keyboard0"
	Driver      "kbd"
	Option	    "XkbModel" "pc105"
	Option	    "XkbLayout" "us"
EndSection

Section "Monitor"
	Identifier   "Monitor0"
	ModelName    "LCD Panel 1920x1200"
	HorizSync    31.5 - 90.0
	VertRefresh  59.9 - 60.1
	Option	    "dpms"
EndSection

Section "Monitor"
	Identifier   "aticonfig-Monitor[0]"
	Option	    "VendorName" "ATI Proprietary Driver"
	Option	    "ModelName" "Generic Autodetecting Monitor"
	Option	    "DPMS" "true"
EndSection

Section "Device"
	Identifier  "Videocard0"
	Driver      "vesa"
EndSection

Section "Device"
	Identifier  "aticonfig-Device[0]"
	Driver      "fglrx"
	Option	    "DesktopSetup" "mirror"
EndSection

Section "Screen"
	Identifier "Screen0"
	Device     "Videocard0"
	Monitor    "Monitor0"
	DefaultDepth     24
	SubSection "Display"
		Viewport   0 0
		Depth     24
		Modes    "800x600" "640x480"
	EndSubSection
EndSection

Section "Screen"
	Identifier "aticonfig-Screen[0]"
	Device     "aticonfig-Device[0]"
	Monitor    "aticonfig-Monitor[0]"
	DefaultDepth     24
	SubSection "Display"
		Viewport   0 0
		Depth     24
		Modes     "1920x1200" "1600x1200" "1280x1024" "1024x768"
	EndSubSection
EndSection


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