j'ai un petit problème avec la configuration de mon xorg.conf sur mes deux écrans

sous kde4, le 2ième écran s'allume: écran noir, la souris fonctionne sur cet écran, mais je n'arrive pas à y mettre une fenêtre...
je ne sais pas si le problème vient de mon xorg.conf, du driver nvidia ou un détail que je n'aurais pas vu dans kde
voilà les détails:
carte graphique geforce 8600GT
driver nvidia 173.14.12
et le xorg.conf en question si ca peut vous aider à m'aider

Code : Tout sélectionner
# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings: version 1.0 (buildmeister@builder58) Thu Jul 17 18:39:42 PDT 2008
Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0" 1280 0
Screen 1 "Screen1" LeftOf "Screen0"
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
EndSection
Section "Files"
RgbPath "/usr/lib/X11/rgb"
EndSection
Section "Module"
Load "dbe"
Load "extmod"
Load "type1"
Load "freetype"
Load "glx"
EndSection
Section "ServerFlags"
Option "Xinerama" "1"
EndSection
Section "InputDevice"
# generated from default
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection
Section "InputDevice"
Identifier "Keyboard0"
Driver "keyboard"
Option "XkbRules" "xorg"
Option "XkbModel" "logitech_g15"
Option "XkbLayout" "ch"
Option "XkbVariant" "fr"
EndSection
Section "Monitor"
# HorizSync source: edid, VertRefresh source: edid
Identifier "Monitor0"
VendorName "Unknown"
ModelName "Iiyama MM904U"
HorizSync 30.0 - 96.0
VertRefresh 50.0 - 160.0
ModeLine "1280x1024" 157.500 1280 1344 1504 1728 1024 1025 1028 1072 +hsync +vsync
ModeLine "1024x768" 113.310 1024 1096 1208 1392 768 769 772 814 -hsync +vsync
ModeLine "800x600" 68.180 800 848 936 1072 600 601 604 636 -hsync +vsync
ModeLine "640x480" 43.160 640 680 744 848 480 481 484 509 -hsync +vsync
ModeLine "1280x960" 148.500 1280 1344 1504 1728 960 961 964 1011 +hsync +vsync
ModeLine "1152x864" 143.470 1152 1232 1360 1568 864 865 868 915 -hsync +vsync
ModeLine "768x576" 62.570 768 816 896 1024 576 577 580 611 -hsync +vsync
ModeLine "720x400" 35.500 720 756 828 936 400 401 404 446 -hsync +vsync
ModeLine "640x400" 31.500 640 672 736 832 400 401 404 445 -hsync +vsync
ModeLine "640x350" 31.500 640 672 736 832 350 382 385 445 +hsync -vsync
Option "DPMS"
EndSection
Section "Monitor"
# HorizSync source: edid, VertRefresh source: edid
Identifier "Monitor1"
VendorName "Unknown"
ModelName "Iiyama PL1702"
HorizSync 31.0 - 64.0
VertRefresh 50.0 - 60.0
Option "DPMS"
EndSection
Section "Device"
Identifier "Videocard0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce 8600 GT"
BusID "PCI:1:0:0"
Screen 0
EndSection
Section "Device"
Identifier "Videocard1"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce 8600 GT"
BusID "PCI:1:0:0"
Screen 1
EndSection
Section "Screen"
Identifier "Screen0"
Device "Videocard0"
Monitor "Monitor0"
DefaultDepth 24
Option "TwinView" "0"
Option "TwinViewXineramaInfoOrder" "CRT-0"
Option "metamodes" "CRT: 1280x1024_85 +0+0; CRT: 1280x1024 +0+0; CRT: 1024x768 +0+0; CRT: 800x600 +0+0; CRT: 640x480 +0+0"
SubSection "Display"
Depth 24
EndSubSection
EndSection
Section "Screen"
Identifier "Screen1"
Device "Videocard1"
Monitor "Monitor1"
DefaultDepth 24
Option "TwinView" "0"
Option "metamodes" "DFP: 1280x1024_70 +0+0"
SubSection "Display"
Depth 24
EndSubSection
EndSection

merci