ati and 2 monitors with 2 different resolutions : is it possible ?

[giggz]

Hi,

Happy new year!

I have a question :
on my laptop (debian sid), I have a second monitor on the VGA output.

I don't have any problem on the VGA output when the monitor has the same
display resolution (1400x1050) as the LVDS monitor.
But when my second monitor has a lower resolution (1024x768), I can have
a correct "clone" mode : on the second monitor I have a part of the
"big" one (a rectangle 1024x768).

Is there something to do ?

Best regards,
GiGGz

Here is my xorg.conf :
Section "InputDevice"
	Identifier	"Generic Keyboard"
	Driver		"kbd"
	Option		"CoreKeyboard"
	Option		"XkbRules"	"xorg"
	Option		"XkbModel"	"pc105"
	Option		"XkbLayout"	"fr"
##a commenter pour avoir le circonflexe
#	Option		"XkbVariant"	"nodeadkeys"
## Touche compose (commente a cause de awesome)
#	Option          "XkbOptions"    "compose:lwin"	
EndSection

Section "InputDevice"
	Identifier	"Configured Mouse"
	Driver		"mouse"
	Option		"CorePointer"
## inutile
#	Option		"Device"		"/dev/input/mice"
#	Option		"Protocol"		"ImPS/2"
	Option		"Emulate3Buttons"	"false"
EndSection

Section "InputDevice"
	Identifier	"Synaptics Touchpad"
	Driver		"synaptics"
	Option		"SendCoreEvents"	"true"
	Option		"Device"		"/dev/psaux"
	Option		"Protocol"		"auto-dev"
	Option		"HorizScrollDelta"	"0"
	Option		"MaxTapTime" "0"
	Option		"MaxTapMove" "0"
EndSection

Section "Device"
	Identifier	"ATI RADEON MOBILITY"
	Driver		"radeon"
	BusID		"PCI:1:0:0"
#        Option		"MonitorLayout"		"LVDS,NONE"
#        Option		"MonitorLayout"		"LVDS,CRT"
#	Option		"AccelDFS"	"0"
## apparemment plus necessaire le mode AGP = 4 est pris par defaut
	Option		"AGPMode"	"4"
##	Option		"AGPMode"	"8"
	Option		"AGPSize"	"128"
	Option		"GARTSize"	"64"
#	Option		"RingSize"		"2"
## fait planter ppracer
##	Option		"RingSize"		"4"
	Option		"RingSize"		"8"
	Option		"BufferSize"		"2"
##pour faire marcher les hotkeys de l'ecran (marche pas pour l'instant)
#	Option		"BIOSHotkeys"	"on"
## option activee par default
#	Option		"UseFBDev"		"true"
## option activee par defaut (color tiling)
#	Option		"ColorTiling"	"on"
#	Option		"EnableDepthMoves"	"yes"
#	Option		"XaaNoOffscreenPixmaps" "false" # Faster RENDER acceleration
#       Option		"RenderAccel" "true"
#	Option		"AccelMethod"	"EXA"
##	Option		"AGPFastWrite"	"true"
#	Option		"backingstore"	"true"
#       Option		"AllowGLXWithComposite" "true"
	Option		"EnablePageFlip"	"true"
#	Option		"DynamicClocks"		"true"
##
#	Option		"Monitor-VGA-0"		"VGA"
#	Option		"Monitor-DVI-0"		"LCD SAMSUNG"
#	Option		"Monitor-LVDS"		"LCD SAMSUNG"
EndSection

Section "Monitor"
	Identifier	"LCD SAMSUNG"
	Option		"DPMS"
        HorizSync       31.5-90
        VertRefresh     59-75
EndSection

#Section "Monitor"
#	Identifier	"VGA"
#	Option		"DPMS"
##	Option 		"RightOf"  "LCD SAMSUNG"
##        HorizSync       31.5-90
##        VertRefresh     59-75
#EndSection

Section "Screen"
	Identifier	"Default Screen"
	Device		"ATI RADEON MOBILITY"
	Monitor		"LCD SAMSUNG"
	DefaultDepth	24
 	Subsection	"Display"
		Depth	24
		Modes	"1400x1050"
## non necessaire
#		Modes		"1400x1050" "1280x1024" "1024x768"
## 1024x768 &  1400x1050
		Virtual 2424 1050
## 1280x1024 &  1400x1050
#		Virtual 2680 1050
## 1400x1050 &  1400x1050
#		Virtual 2800 1050
## 1680x1050 &  1400x1050
#		Virtual 3080 1050
	EndSubSection
EndSection

Section "ServerLayout"
	Identifier	"Default Layout"
	Screen		"Default Screen"
	InputDevice	"Generic Keyboard"
	InputDevice	"Configured Mouse"
	InputDevice	"Synaptics Touchpad"
EndSection

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