conf nao acha modulo da placa de video!!

eu instalei minha placa de video da nvidia dai carreguei com o modprobe nvidia coloquei a conf abaixo pro xorg.conf e dei startx, mas nao foi disse q tipo nao achou o modulo..

Section "ServerLayout"

Identifier "Simple Layout"
Screen "Screen 1" 0 0
InputDevice "Mouse1" "CorePointer"
InputDevice "Keyboard1" "CoreKeyboard"

EndSection

Section "Files"

RgbPath "/usr/X11R6/lib/X11/rgb"
FontPath "/usr/X11R6/lib/X11/fonts/local/"
FontPath "/usr/X11R6/lib/X11/fonts/misc/"
FontPath "/usr/X11R6/lib/X11/fonts/75dpi/:unscaled"
FontPath "/usr/X11R6/lib/X11/fonts/100dpi/:unscaled"
FontPath "/usr/X11R6/lib/X11/fonts/Type1/"
FontPath "/usr/X11R6/lib/X11/fonts/CID/"
FontPath "/usr/X11R6/lib/X11/fonts/Speedo/"
FontPath "/usr/X11R6/lib/X11/fonts/75dpi/"
FontPath "/usr/X11R6/lib/X11/fonts/100dpi/"
FontPath "/usr/X11R6/lib/X11/fonts/cyrillic/"

EndSection

Section "Module"

Load "dbe" # Double buffer extension
SubSection "extmod"
Option "omit xfree86-dga" # don't initialise the DGA extension
EndSubSection

Load "extmod"
Load "type1"
Load "speedo"
Load "xtt"
Load "freetype"
Load "glx"

EndSection

Section "InputDevice"

Option "XkbRules" "xorg"
Option "XkbModel" "abnt2"
Option "XkbLayout" "br"

Identifier "Keyboard1"
Driver "Keyboard"

EndSection

Section "InputDevice"

Identifier "Mouse1"
Driver "mouse"
Option "Protocol" "IMPS/2"

Option "Device" "/dev/input/mice"
Option "ZaxisMapping" "4 5"
Option "Buttons" "5"

EndSection

Section "Monitor"

Identifier "My Monitor"
HorizSync 31.5 - 50.0
VertRefresh 40.0 - 90.0

EndSection

Section "Device"

Identifier "NV AGP"
VendorName "nvidia"
Driver "nvidia"
VideoRam 262144
BusID "PCI:01:00:0"

EndSection

Section "Screen"

Identifier "Screen 1"
# Device "VESA Framebuffer"
Device "NV AGP"
Monitor "My Monitor"
DefaultDepth 24
SubSection "Display"
Depth 8
Modes "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 16
Modes "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 24
Modes "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 32
Modes "1024x768" "800x600" "640x480"
EndSubSection
EndSection

Section "ServerLayout"
Identifier "NV AGP"
Screen "Screen 1"
InputDevice "Mouse1" "CorePointer"
InputDevice "Keyboard1" "CoreKeyboard"
EndSection