xorg.conf 3 screens

Section "ServerLayout"
	Identifier     "X.org Configured"
	Screen      0  "Screen0" 0 0
	Screen      1  "Screen2" 2668 0
#	Screen      2  "Screen2"
	InputDevice    "Mouse0" "CorePointer"
	InputDevice    "Keyboard0" "CoreKeyboard"
#        Option         "Xinerama" "True"
	Option		"RandR"	"True"
EndSection

Section "Files"
	ModulePath   "/usr/lib/xorg/modules"
	FontPath     "/usr/share/fonts/X11/misc"
	FontPath     "/usr/share/fonts/X11/cyrillic"
	FontPath     "/usr/share/fonts/X11/100dpi/:unscaled"
	FontPath     "/usr/share/fonts/X11/75dpi/:unscaled"
	FontPath     "/usr/share/fonts/X11/Type1"
	FontPath     "/usr/share/fonts/X11/100dpi"
	FontPath     "/usr/share/fonts/X11/75dpi"
	FontPath     "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
	FontPath     "built-ins"
EndSection

Section "Module"
	Load  "record"
	Load  "extmod"
	Load  "dri2"
	Load  "dri"
	Load  "glx"
	Load  "drm"
	Load  "dbe"
EndSection

Section "InputDevice"
	Identifier  "Keyboard0"
	Driver      "kbd"
EndSection

Section "InputDevice"
	Identifier  "Mouse0"
	Driver      "mouse"
	Option	    "Protocol" "auto"
	Option	    "Device" "/dev/input/mice"
	Option	    "ZAxisMapping" "4 5 6 7"
EndSection

Section "Monitor"
	Identifier   "Monitor0"
	VendorName   "Monitor Vendor"
	ModelName    "Monitor Model"
        Option       "DPMS"
	Option	     "PreferredMode" "1280x1024_60.00"
	Option "RandRotate" "on"
EndSection

Section "Monitor"
	Identifier   "Monitor1"
	VendorName   "Monitor Vendor"
	ModelName    "Monitor Model"
	Option	     "PreferredMode" "1280x1024_60.00"
#	Option	     "Position" "1388 0"	#used with nouveau
	Option "RandRotate" "on"
        Option       "DPMS"
EndSection

Section "Monitor"
	Identifier   "Monitor2"
	VendorName   "Monitor Vendor"
	ModelName    "Monitor Model"
	Option	     "PreferredMode" "1280x1024_60.00"
#	Option	     "Position" "0 0"
#	Option	     "Position" "2672 0"
	Option "RandRotate" "on"
        Option       "DPMS"
EndSection

Section "Device"
        ### Available Driver options are:-
        ### Values: <i>: integer, <f>: float, <bool>: "True"/"False",
        ### <string>: "String", <freq>: "<f> Hz/kHz/MHz",
        ### <percent>: "<f>%"
        ### [arg]: arg optional
        #Option     "SWcursor"           	# [<bool>]
        #Option     "HWcursor"           	# [<bool>]
        #Option     "NoAccel"            	# [<bool>]
        #Option     "ShadowFB"           	# [<bool>]
        #Option     "VideoKey"           	# <i>
        #Option     "WrappedFB"          	# [<bool>]
        Option     "GLXVBlank" "True"         	# [<bool>]
        #Option     "ZaphodHeads"        	# <str>
        #Option     "PageFlip"           	# [<bool>]
	Option      "TripleBuffer" "true"
        Option         "AllowGLXWithComposite" "True"
        Option         "AddARGBGLXVisuals" "True"
	Option      "MigrationHeuristic" "greedy"
#	Option	    "Metamodes" "DVI-I-1: 1280x1024_60 +0+0, DVI-I-2: 1280x1024_60 +1392+0"	#old
        Option      "metamodes" "CRT-0: nvidia-auto-select +0+0, CRT-1: nvidia-auto-select +1420+0"
	Option      "Monitor-DVI-I-1" "Monitor0"
	Option      "Monitor-DVI-I-2" "Monitor1"
	Option	    "TwinView"	"1"
#	Screen	    "Screen0"
	Screen	    0
	Identifier  "nvidia-card"
	Driver      "nvidia"
	BusID       "PCI:1:0:0"
EndSection

Section "Device"
        ### Available Driver options are:-
        ### Values: <i>: integer, <f>: float, <bool>: "True"/"False",
        ### <string>: "String", <freq>: "<f> Hz/kHz/MHz",
        ### <percent>: "<f>%"
        ### [arg]: arg optional
        Option     "DRI"                "False"	# [<bool>]
        #Option     "ColorKey"           	# <i>
        #Option     "VideoKey"           	# <i>
        #Option     "FallbackDebug"      	# [<bool>]
        #Option     "Tiling"             	# [<bool>]
        #Option     "LinearFramebuffer"  	# [<bool>]
        #Option     "Shadow"             	# [<bool>]
        Option     "SwapbuffersWait" "True"    	# [<bool>]
        Option     "TripleBuffer" "true"       	# [<bool>]
        #Option     "XvMC"               	# [<bool>]
        #Option     "XvPreferOverlay"    	# [<bool>]
        #Option     "DebugFlushBatches"  	# [<bool>]
        #Option     "DebugFlushCaches"   	# [<bool>]
        #Option     "DebugWait"          	# [<bool>]
        #Option     "HotPlug"            	# [<bool>]
        #Option     "RelaxedFencing"     	# [<bool>]
#        Option         "AllowGLXWithComposite" "True"
#        Option         "AddARGBGLXVisuals" "True"
##	Option	    "AccelMethod" "EXA" #this from 2.6.28 on is the fallback
#	Option	    "AccelMethod" "UXA"
##	Option      "ExaNoComposite" "true"
#	Option      "MigrationHeuristic" "greedy"
	Option	    "Monitor-VGA1" "Monitor2"
#	Screen	    1
	Identifier  "intel-card"
	Driver      "intel"
	BusID       "PCI:0:2:0"
EndSection

Section "Screen"
	Identifier "Screen0"
	Device     "nvidia-card"
	Monitor    "Monitor0"
	Monitor    "Monitor1"
	SubSection "Display"
#		Viewport   0 0
#		Virtual	2668 1024
		Virtual	2700 1024
		Depth     24
	EndSubSection
EndSection

Section "Screen"
	Identifier "Screen1"
	Device     "nvidia-card"
	Monitor    "Monitor1"
	SubSection "Display"
#		Viewport   1280 0
#		Virtual	1280 1024
		Depth     24
	EndSubSection
EndSection

Section "Screen"
	Identifier "Screen2"
	Device     "intel-card"
	Monitor    "Monitor2"
	SubSection "Display"
#		Viewport   2672 0
#		Viewport   0 0
		Virtual 1280 1024
		Depth     24
	EndSubSection
EndSection

Section "Extensions"
    Option         "Composite" "Enable"
EndSection

Section "ServerFlags"
	Option "AIGLX" "on"
EndSection