Spero che tu mi possa dare una mano..ti ringrazio in anticipo

non va messo; infatti giustamente nel tuo xorg.conf non c’è scritto di caricare tale modulo (che è per ati).
Ciao.

ciao ciao

# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig: version 1.0 (buildmeister@builder3) Wed Jun 13 18:39:30 PDT 2007

# /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 xorg.conf(5) manual page.
# (Type “man 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 “ServerLayout”
Identifier “Default Layout”
Screen “Default Screen” 0 0
InputDevice “Generic Keyboard”
InputDevice “Configured Mouse”
InputDevice “stylus” “SendCoreEvents”
InputDevice “cursor” “SendCoreEvents”
InputDevice “eraser” “SendCoreEvents”
EndSection

Section “Files”

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

Section “Module”
Load “i2c”
Load “bitmap”
Load “ddc”
Load “extmod”
Load “freetype”
Load “glx”
Load “int10″
Load “vbe”
EndSection

Section “InputDevice”
Identifier “Generic Keyboard”
Driver “kbd”
Option “CoreKeyboard”
Option “XkbRules” “xorg”
Option “XkbModel” “pc105″
Option “XkbLayout” “it”
EndSection

Section “InputDevice”
Identifier “Configured Mouse”
Driver “mouse”
Option “CorePointer”
Option “Device” “/dev/input/mice”
Option “Protocol” “ImPS/2″
Option “ZAxisMapping” “4 5″
Option “Emulate3Buttons” “true”
EndSection

Section “InputDevice”
Identifier “stylus”
Driver “wacom”
Option “Device” “/dev/input/wacom”
Option “Type” “stylus”
Option “ForceDevice” “ISDV4″ # Tablet PC ONLY
EndSection

Section “InputDevice”
Identifier “eraser”
Driver “wacom”
Option “Device” “/dev/input/wacom”
Option “Type” “eraser”
Option “ForceDevice” “ISDV4″ # Tablet PC ONLY
EndSection

Section “InputDevice”
Identifier “cursor”
Driver “wacom”
Option “Device” “/dev/input/wacom”
Option “Type” “cursor”
Option “ForceDevice” “ISDV4″ # Tablet PC ONLY
EndSection

Section “Monitor”
Identifier “Acer AL1916W”
HorizSync 31.0 – 84.0
VertRefresh 56.0 – 76.0
Modeline “1440×900″ 106.5 1440 1520 1672 1904 900 901 904 932 -HSync +VSync
Option “DPMS”
EndSection

Section “Device”
Identifier “nVidia Corporation G80 [GeForce 8800 GTS]“
Driver “nvidia”
Option “RenderAccel” “true”
Option “NoRenderExtension” “false”
Option “DisableGLXRootClipping” “true”
Option “AddARGBGLXVisuals” “true”
Option “AllowGLXWithComposite” “true”
EndSection

Section “Screen”
Identifier “Default Screen”
Device “nVidia Corporation G80 [GeForce 8800 GTS]“
Monitor “Acer AL1916W”
DefaultDepth 24
SubSection “Display”
Depth 24
Modes “1440×900″ “1024×768″ “800×600″ “640×480″
EndSubSection
EndSection

Section “DRI”
Mode 0666
EndSection

Section “Extensions”
Option “Composite” “Enable”
EndSection