Forum Linux.debian/ubuntu Problème clavier et souris USB sous Xorg

Bonjour à tous!

Je viens de m'acheter un nouveau PC, et je me suis empresser d'installer Ubuntu dessus.
(Je l'ai déjà installé sur 2 autres ordinateurs plus vieux, avec succès)

J'ai commencer en utilisant la version desktop d'ubuntu 6.10 (32 bits).
Au démarrage du CD, j'ai pu modifer la langue et la résolution (la clavier marchait donc), mais une fois arriver sous gnome, ni le clavier ni la souris n'était reconnu, je ne pouvais plus que re-démarrer mon ordi deouis le bouton.

J'ai essayer la desktop 6.06, et là, j'ai accès à la souris et au clavier pendant quelques secondes, puis plus rien.

J'ai essayer la version alternante 6.10, en me disant que peut-être cela changerait, j'ai bienpu paramétrer tout ce qu'il y avait à faire, l'installation s'est bien déroulée, je redémarre l'ordinateur, je me changer de système sous grub, mais une fois arrivé à l'écran de connexion, plus de clavier ni souris.......

J'ai parcouru divers forum sur Internet, et je suis tombé sur quelqu'un parlant de Knoppix. Alors j'ai téléchargé la version 5.0 DVD, et j'ai essayé.
Et là, miracle, le clavier et la souris fonctionne!!!!!!!!!!!!!!!!
J'ai regardé le fichier xorg.conf, et ai essayé de modifier le mieux en conséquence, mais ça n'a pas marché...............

Voici ma configuration :
- Athlon64 X2 4200 (j'ai installé la version 32 bits d'ubuntu car il semblerait qu'en 64 bits, tout n'est pas encore prêt)
- clavier et souris DELL usb (pas de ports PS/2).
- quoi d'autres?

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Résultat de lspci (depuis Knoppix) :

0000:00:00.0 RAM memory: nVidia Corporation C51 Host Bridge (rev a2)
0000:00:00.1 RAM memory: nVidia Corporation C51 Memory Controller 0 (rev a2)
0000:00:00.2 RAM memory: nVidia Corporation C51 Memory Controller 1 (rev a2)
0000:00:00.3 RAM memory: nVidia Corporation C51 Memory Controller 5 (rev a2)
0000:00:00.4 RAM memory: nVidia Corporation C51 Memory Controller 4 (rev a2)
0000:00:00.5 RAM memory: nVidia Corporation C51 Host Bridge (rev a2)
0000:00:00.6 RAM memory: nVidia Corporation C51 Memory Controller 3 (rev a2)
0000:00:00.7 RAM memory: nVidia Corporation C51 Memory Controller 2 (rev a2)
0000:00:02.0 PCI bridge: nVidia Corporation C51 PCI Express Bridge (rev a1)
0000:00:03.0 PCI bridge: nVidia Corporation C51 PCI Express Bridge (rev a1)
0000:00:04.0 PCI bridge: nVidia Corporation C51 PCI Express Bridge (rev a1)
0000:00:09.0 RAM memory: nVidia Corporation MCP51 Host Bridge (rev a2)
0000:00:0a.0 ISA bridge: nVidia Corporation MCP51 LPC Bridge (rev a3)
0000:00:0a.1 SMBus: nVidia Corporation MCP51 SMBus (rev a3)
0000:00:0a.2 RAM memory: nVidia Corporation MCP51 Memory Controller 0 (rev a3)
0000:00:0b.0 USB Controller: nVidia Corporation MCP51 USB Controller (rev a3)
0000:00:0b.1 USB Controller: nVidia Corporation MCP51 USB Controller (rev a3)
0000:00:0e.0 IDE interface: nVidia Corporation MCP51 Serial ATA Controller (rev a1)
0000:00:0f.0 IDE interface: nVidia Corporation MCP51 Serial ATA Controller (rev a1)
0000:00:10.0 PCI bridge: nVidia Corporation MCP51 PCI Bridge (rev a2)
0000:00:10.1 0403: nVidia Corporation MCP51 High Definition Audio (rev a2)
0000:00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration
0000:00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map
0000:00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller
0000:00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control
0000:03:00.0 VGA compatible controller: ATI Technologies Inc: Unknown device 7183
0000:03:00.1 Display controller: ATI Technologies Inc: Unknown device 71a3
0000:04:07.0 Ethernet controller: Broadcom Corporation BCM4401-B0 100Base-TX (rev 02)

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Résultat de lsmod :

Module Size Used by
ipv6 238336 14
sworks_agp 11040 0
nvidia_agp 9756 0
efficeon_agp 10016 0
amd_k7_agp 10380 0
ali_agp 9344 0
af_packet 23816 0
ext3 123016 0
jbd 63008 1 ext3
dm_mod 48404 0
agpgart 29156 5 sworks_agp,nvidia_agp,efficeon_agp,amd_k7_agp,ali_agp
fuse 34952 0
tsdev 9920 0
snd_hda_intel 17684 1
snd_hda_codec 132784 1 snd_hda_intel
snd_pcm_oss 38176 0
snd_mixer_oss 17536 1 snd_pcm_oss
snd_pcm 73220 3 snd_hda_intel,snd_hda_codec,snd_pcm_oss
snd_timer 22148 1 snd_pcm
snd 44768 8 snd_hda_intel,snd_hda_codec,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_timer
b44 23948 0
mii 8448 1 b44
soundcore 11104 1 snd
snd_page_alloc 11272 2 snd_hda_intel,snd_pcm
evdev 11648 1
usbhid 50144 0
pcmcia 33324 0
firmware_class 11648 1 pcmcia
yenta_socket 25612 0
rsrc_nonstatic 14080 1 yenta_socket
pcmcia_core 35992 3 pcmcia,yenta_socket,rsrc_nonstatic
video 17284 0
thermal 14472 0
processor 25736 1 thermal
fan 7300 0
container 7168 0
button 8848 0
battery 11524 0
ac 7428 0
unionfs 61728 1
cloop 20608 2
sbp2 22788 0
ohci1394 33200 0
ieee1394 285784 2 sbp2,ohci1394
usb_storage 76480 0
ohci_hcd 21636 0
uhci_hcd 23308 0
ehci_hcd 32008 0
usbcore 109084 6 usbhid,usb_storage,ohci_hcd,uhci_hcd,ehci_hcd


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Mon fichier xorg.cong (d'origine):

# /etc/X11/xorg.conf (xorg X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the /etc/X11/xorg.conf manual page.
# (Type "man /etc/X11/xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
# sudo dpkg-reconfigure -phigh xserver-xorg

Section "Files"
FontPath "/usr/share/X11/fonts/misc"
FontPath "/usr/share/X11/fonts/cyrillic"
FontPath "/usr/share/X11/fonts/100dpi/:unscaled"
FontPath "/usr/share/X11/fonts/75dpi/:unscaled"
FontPath "/usr/share/X11/fonts/Type1"
FontPath "/usr/share/X11/fonts/100dpi"
FontPath "/usr/share/X11/fonts/75dpi"
FontPath "/usr/share/fonts/X11/misc"
# path to defoma fonts
FontPath "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
EndSection

Section "Module"
Load "i2c"
Load "bitmap"
Load "ddc"
Load "dri"
Load "extmod"
Load "freetype"
Load "glx"
Load "int10"
Load "type1"
Load "vbe"
EndSection

Section "InputDevice"
Identifier "Generic Keyboard"
Driver "kbd"
Option "CoreKeyboard"
Option "XkbRules" "xorg"
Option "XkbModel" "pc105"
Option "XkbLayout" "fr"
Option "XkbOptions" "lv3:ralt_switch"
EndSection

Section "InputDevice"
Identifier "Configured Mouse"
Driver "mouse"
Option "CorePointer"
Option "Device" "/dev/input/mice"
Option "Protocol" "ExplorerPS/2"
Option "ZAxisMapping" "4 5"
Option "Emulate3Buttons" "true"
EndSection

Section "InputDevice"
Driver "wacom"
Identifier "stylus"
Option "Device" "/dev/wacom" # Change to
# /dev/input/event
# for USB
Option "Type" "stylus"
Option "ForceDevice" "ISDV4" # Tablet PC ONLY
EndSection

Section "InputDevice"
Driver "wacom"
Identifier "eraser"
Option "Device" "/dev/wacom" # Change to
# /dev/input/event
# for USB
Option "Type" "eraser"
Option "ForceDevice" "ISDV4" # Tablet PC ONLY
EndSection

Section "InputDevice"
Driver "wacom"
Identifier "cursor"
Option "Device" "/dev/wacom" # Change to
# /dev/input/event
# for USB
Option "Type" "cursor"
Option "ForceDevice" "ISDV4" # Tablet PC ONLY
EndSection

Section "Device"
Identifier "ATI Technologies, Inc. ATI Default Card"
Driver "vesa"
BusID "PCI:3:0:0"
EndSection

Section "Monitor"
Identifier "Generic Monitor"
Option "DPMS"
HorizSync 28-64
VertRefresh 43-60
EndSection

Section "Screen"
Identifier "Default Screen"
Device "ATI Technologies, Inc. ATI Default Card"
Monitor "Generic Monitor"
DefaultDepth 24
SubSection "Display"
Depth 1
Modes "1280x1024" "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 4
Modes "1280x1024" "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 8
Modes "1280x1024" "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 15
Modes "1280x1024" "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 16
Modes "1280x1024" "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 24
Modes "1280x1024" "1024x768" "800x600" "640x480"
EndSubSection
EndSection

Section "ServerLayout"
Identifier "Default Layout"
Screen "Default Screen"
InputDevice "Generic Keyboard"
InputDevice "Configured Mouse"
InputDevice "stylus" "SendCoreEvents"
InputDevice "cursor" "SendCoreEvents"
InputDevice "eraser" "SendCoreEvents"
EndSection

Section "DRI"
Mode 0666
EndSection
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Si vous pouviez m'aider, je serais très heureux, car c'est très frustrant d'avoir un pc tout nouveau tout beau et de devoir resté sous windows XP.

Merci d'acance!!!!