X configuration/Xorg 6.9

[Paul Kaplan]

I have a Thinkpad T40 (2373) with a Radeon M7 video card.  It is connected to 
a Sony X93 external LCD monitor.

With Mandrake 9.2, 10.0, and 10.1 running XFree and more recently XOrg through 
verson 6.8, the XF86Config file shown below allowed me to work with a single 
virtual desktop spanning the internal and external LCDs (Xinerama).

I recently upgraded to Mandriva 2006 which uses XOrg 6.9.  The virtual desktop 
remains, but no signal is sent to the external monitor and as a result I can 
only see the left portion of the virtual desktop.  The problem isn't fixed by 
cycling through the internal/external/both monitor signal (Fn+F7) setting.

Can anyone explain why the change in behavior and suggest a way to fix?
TIA
Paul
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#Dual headed XF86Config for IBM Thinkpad T40-257551U
#Radeon M7 7500
#Works for XFree 4.3, X.org 6.7 and 6.8
#Rename file as necessary for distribution
#originally from Diego Zamboni / linux-thinkpad list

#Section "ServerLayout"
#        Identifier     "Default Layout" 
#	Screen      0  "Screen0" 0 0
#	InputDevice    "Mouse0" "CorePointer"
#	InputDevice    "Keyboard0" "CoreKeyboard"
#	InputDevice    "DevInputMice" "AlwaysCore"
#EndSection

#Section "ServerLayout"
#        Identifier     "Singlehead" 
#	Screen      0  "Screen0" 0 0
#        Screen         "Screen0"
#        Screen         "Screen1" RightOf "Screen0"
#	InputDevice    "Mouse0" "CorePointer"
#	InputDevice    "Keyboard0" "CoreKeyboard"
#	InputDevice    "DevInputMice" "AlwaysCore"
#EndSection

Section "ServerLayout"
	Identifier     "Multihead"
#	Screen      0  "Screen0" 0 0
        Screen         "Screen0"
        Screen         "Screen1" RightOf "Screen0"
	Option         "Xinerama" "true"
	InputDevice    "Mouse0" "CorePointer"
	InputDevice    "Keyboard0" "CoreKeyboard"
	InputDevice    "DevInputMice" "AlwaysCore"
EndSection

Section "Files"
    # Multiple FontPath entries are allowed (they are concatenated together)
    # By default, Mandrake 6.0 and later now use a font server independent of
    # the X server to render fonts.
    FontPath "unix/:-1"
EndSection

Section "Module"
	Load  "dbe"
	Load  "extmod"
	Load  "fbdevhw"
	Load  "glx"
	Load  "record"
	Load  "freetype"
	Load  "type1"
#	Load  "dri"
EndSection

Section "InputDevice"
	Identifier  "Keyboard0"
	Driver      "keyboard"
	Option	    "XkbRules" "xfree86"
	Option	    "XkbModel" "pc105"
	Option	    "XkbLayout" "us"
EndSection

Section "InputDevice"
	Identifier  "Mouse0"
	Driver      "mouse"
	Option	    "Protocol" "PS/2"
	Option	    "Device" "/dev/psaux"
	Option	    "ZAxisMapping" "4 5"
	Option	    "Emulate3Buttons" "yes"
EndSection

Section "InputDevice"
# If the normal CorePointer mouse is not a USB mouse then
# this input device can be used in AlwaysCore mode to let you
# also use USB mice at the same time.
	Identifier  "DevInputMice"
	Driver      "mouse"
	Option	    "Protocol" "IMPS/2"
	Option	    "Device" "/dev/input/mice"
	Option	    "ZAxisMapping" "4 5"
	Option	    "Emulate3Buttons" "yes"
EndSection

Section "Monitor"
	Identifier   "Monitor0"
	VendorName   "Monitor Vendor"
	ModelName    "Unprobed Monitor"
#	HorizSync    31.5 - 48.5
#	VertRefresh  40.0 - 70.0
	Option	    "dpms"
EndSection

Section "Monitor"
	Identifier   "Monitor1"
	VendorName   "Monitor Vendor"
	ModelName    "Unprobed Monitor"
#	HorizSync    31.5 - 67.0
#	VertRefresh  50.0 - 75.0
	Option	    "dpms"
#        Modeline     "1280x1024" 135.00 1280 1308 1412 1676 1024 1027 1030 
1056
EndSection

Section "Device"
	Identifier  "Videocard0"
	Driver      "radeon"
	VendorName  "Videocard vendor"
	BoardName   "ATI Radeon Mobility M7"
#	VideoRam    32768
        Screen      0
        BusID       "PCI:1:0:0"
EndSection

Section "Device"
	Identifier  "Videocard1"
	Driver      "radeon"
	VendorName  "Videocard vendor"
	BoardName   "ATI Radeon Mobility M7"
#	VideoRam    32768
        Screen      1
        BusID       "PCI:1:0:0"
EndSection

Section "Screen"
#       This is the internal LCD display  
	Identifier "Screen0"
	Device     "Videocard0"
	Monitor    "Monitor0"
	DefaultDepth     24
	SubSection "Display"
		Depth     24
		Modes    "1024x768" "800x600"
	EndSubSection
EndSection

Section "Screen"
#       This is an external monitor running 1280x1024 
	Identifier "Screen1"
	Device     "Videocard1"
	Monitor    "Monitor1"
	DefaultDepth     24
	SubSection "Display"
		Depth     24
		Modes    "1280x1024"  "1024x768"
	EndSubSection
EndSection

#Section "DRI"
#	Group        0
#	Mode         0666
#EndSection
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