Forum Linux.mandriva Problèmes dual Screen - intel 945gm - Lenovo 3000 V100

Bonsoir,
J'ai un gros soucis de qualité d'image sur mon plat connecté à la sortie VGA de mon PC portable. J'ai " du canal + " sur mon écran externe.

La résolution de mon écran de portable est 1280x800 et la résolution acceptable de mon écran externe est 1280x1024.

Je vous joins mon xorg.conf, un lspci et le log de chargement de Xorg.

Le log :
http://lambdacrash.homelinux.org/~brice/forum/Xorg.0.log.txt
Le xorg.conf :
http://lambdacrash.homelinux.org/~brice/forum/xorg.conf.txt
Le lspci :

00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS/940GML and 945GT Express Memory Controller Hub (rev 03)
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS/940GML Express Integrated Graphics Controller (rev 03)
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/940GML Express Integrated Graphics Controller (rev 03)
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 02)
00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 02)
00:1c.2 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 3 (rev 02)
00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #1 (rev 02)
00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #2 (rev 02)
00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #3 (rev 02)
00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #4 (rev 02)
00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e2)
00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 02)
00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller (rev 02)
00:1f.2 SATA controller: Intel Corporation 82801GBM/GHM (ICH7 Family) Serial ATA Storage Controller AHCI (rev 02)
00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 02)
04:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG Network Connection (rev 02)
0a:01.0 FireWire (IEEE 1394): Ricoh Co Ltd Unknown device 0832
0a:01.1 Class 0805: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 19)
0a:01.2 System peripheral: Ricoh Co Ltd Unknown device 0843 (rev 01)
0a:01.3 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter (rev 0a)
0a:01.4 System peripheral: Ricoh Co Ltd xD-Picture Card Controller (rev 05)
0a:07.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)

D'avance merci, cela fait plusieurs mois que je fouille le net à la recherche d'une solution. En vain.