Xinerama-a-rama

How to get Dual Head working on Dell’s Latitude c610

With one monitor plugged into the monitor port and the LCD display, you too can have a dual-head setup. It’s great. You do it like this:

In XF86Config:

Section "Device"
	Identifier	"radeon_one"
	Driver		"radeon"
	BusID	"PCI:1:0:0"
	Screen		1
EndSection

Section "Device"
	Identifier	"radeon_zero"
	Driver		"radeon"
	Screen		0
	BusID	"PCI:1:0:0"
EndSection

Section "Monitor"
	Identifier	"LCD"
	HorizSync	30-57
	VertRefresh	43-72
	Option		"DPMS"
EndSection

Section "Monitor"
	Identifier	"CRT"
	HorizSync	30-57
	VertRefresh	43-72
	Option		"DPMS"
EndSection

Section "Screen"
	Identifier	"LCD Screen"
	Device		"radeon_zero"
	Monitor		"LCD"
	DefaultDepth	24
	SubSection "Display"
		Depth		24
		Modes		"1024x768" "800x600" "640x480"
	EndSubSection
EndSection

Section "Screen"
	Identifier	"Monitor Screen"
	Device		"radeon_one"
	Monitor		"CRT"
	DefaultDepth	24
	SubSection "Display"
		Depth		24
		Modes		"1280x1024" "1024x768" "800x600" "640x480"
	EndSubSection
EndSection


Section "ServerLayout"
	Identifier	"Default Layout"
	Screen		"LCD Screen" rightOf "Monitor Screen"
	Screen		"Monitor Screen"
	InputDevice	"Generic Keyboard"
	InputDevice	"Configured Mouse"
	Option		"Xinerama"
EndSection