XFree86-DRI missing

[Jule Slootbeek <jslootbeek@clarku.edu>]

Debian-users,

another something i've been trying to figure out for a while.
I have a nVidia GeForce MX 420 running the latest drivers, but whenever 
i try to run a opengl prog, like glxgears i get this:

jule@dolphy:~$ glxgears
Xlib:  extension "XFree86-DRI" missing on display ":0.0".
X connection to :0.0 broken (explicit kill or server shutdown).

the nvidia readme tells me to unload the dri module in XF86Config, which 
i did, but i'm not sure how to get rid of this error, any ideas are 
apreciated, thanks!!

-JSS

ps. attached is XF86Config
--
Jule Slootbeek
jslootbeek@clarku.edu
http://www.thesloot.com

# XF86Config-4 (XFree86 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 XF86Config-4 manual page.
# (Type "man XF86Config-4" at the shell prompt.)
#
# This file is automatically updated on xserver-xfree86 package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xfree86
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following commands as root:
#
#   cp /etc/X11/XF86Config-4 /etc/X11/XF86Config-4.custom
#   md5sum /etc/X11/XF86Config-4 > /var/lib/xfree86/XF86Config-4.md5sum
#   dpkg-reconfigure xserver-xfree86
Section "Files"
	FontPath	"unix/:7100"			# local font server
	# if the local font server has problems, we can fall back on these
	FontPath	"/usr/lib/X11/fonts/misc"
	FontPath	"/usr/lib/X11/fonts/cyrillic"
	FontPath	"/usr/lib/X11/fonts/100dpi/:unscaled"
	FontPath	"/usr/lib/X11/fonts/75dpi/:unscaled"
	FontPath	"/usr/lib/X11/fonts/Type1"
	FontPath	"/usr/lib/X11/fonts/CID"
	FontPath	"/usr/lib/X11/fonts/Speedo"
	FontPath	"/usr/lib/X11/fonts/100dpi"
	FontPath	"/usr/lib/X11/fonts/75dpi"
EndSection
Section "Module"
	Load	"bitmap"
	Load	"dbe"
	Load	"ddc"
	Load	"extmod"
	Load	"freetype"
	Load	"glx"
	Load	"int10"
	Load	"record"
	Load	"speedo"
	Load	"type1"
	Load	"vbe"
EndSection
Section "InputDevice"
	Identifier	"Generic Keyboard"
	Driver		"keyboard"
	Option		"CoreKeyboard"
	Option		"XkbRules"	"xfree86"
	Option		"XkbModel"	"pc104"
	Option		"XkbLayout"	"us"
EndSection
Section "InputDevice"
	Identifier	"Configured Mouse"
	Driver		"mouse"
	Option		"CorePointer"
	Option		"Device"		"/dev/psaux"
	Option		"Protocol"		"ImPS/2"
	Option		"Emulate3Buttons"	"true"
	Option		"ZAxisMapping"		"4 5"
EndSection

Section "Device"
	Identifier	"NVIDIA Corporation NV17 [GeForce4 MX 420]"
	Driver		"nvidia"
EndSection

Section "Monitor"
	Identifier	"Generic Monitor"
	HorizSync	30-65
	VertRefresh	50-75
	Option		"DPMS"
EndSection

Section "Screen"
	Identifier	"Default Screen"
	Device		"NVIDIA Corporation NV17 [GeForce4 MX 420]"
	Monitor		"Generic Monitor"
	DefaultDepth	24
	SubSection "Display"
		Depth		1
		Modes		"1280x1024"
	EndSubSection
	SubSection "Display"
		Depth		4
		Modes		"1280x1024"
	EndSubSection
	SubSection "Display"
		Depth		8
		Modes		"1280x1024"
	EndSubSection
	SubSection "Display"
		Depth		15
		Modes		"1280x1024"
	EndSubSection
	SubSection "Display"
		Depth		16
		Modes		"1280x1024"
	EndSubSection
	SubSection "Display"
		Depth		24
		Modes		"1280x1024"
	EndSubSection
EndSection

Section "ServerLayout"
	Identifier	"Default Layout"
	Screen		"Default Screen"
	InputDevice	"Generic Keyboard"
	InputDevice	"Configured Mouse"
EndSection