Having installed the NVidia GLX and matching Mandrake rpms, and having made 
the changes in my XF86config-4 file, I get the following message when I run 
startx:


XFree86 Version 4.2.0 / X Window System
(protocol Version 11, revision 0, vendor release 6600)
Release Date: 18 January 2002
        If the server is older than 6-12 months, or if your card is
        newer than the above date, look for a newer version before
        reporting problems.  (See http://www.XFree86.Org/)
Build Operating System: Linux 2.4.17 i686 [ELF]
Module Loader present
Markers: (--) probed, (**) from config file, (==) default setting,
         (++) from command line, (!!) notice, (II) informational,
         (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/XFree86.0.log", Time: Mon Feb 11 16:57:56
2002
(==) Using config file: "/etc/X11/XF86Config-4"
(EE) NVIDIA(0): Failed to initialize the NVdriver kernel module!
(EE) NVIDIA(0):  *** Aborting ***
(EE) Screen(s) found, but none have a usable configuration.

Fatal server error:
no screens found

When reporting a problem related to a server crash, please send
the full server output, not just the last messages.
This can be found in the log file "/var/log/XFree86.0.log".
Please report problems to xfree86 at xfree86.org.

XIO:  fatal IO error 104 (Connection reset by peer) on X server ":0.0"
      after 0 requests (0 known processed) with 0 events remaining.


The following is my XF86Config-4 -- any ideas as to what I've got to do to 
get a usable configuration?

(When I comment out the 

load "glx"

line, and change 

Section "Device"
    Identifier  "NVIDIA GeForce2 DDR (generic)"
    VendorName  "Unknown"
    BoardName   "Unknown"
    Driver      "nvidia"

to


Section "Device"
    Identifier  "NVIDIA GeForce2 DDR (generic)"
    VendorName  "Unknown"
    BoardName   "Unknown"
    Driver      "nv"

it works just fine, with the built-in Mandrake nv driver.

Help?







# File generated by XFdrake.

# **********************************************************************
# Refer to the XF86Config(4/5) man page for details about the format of
# this file.
# **********************************************************************

Section "Files"

    RgbPath	"/usr/X11R6/lib/X11/rgb"

# Multiple FontPath entries are allowed (they are concatenated together)
# By default, Mandrake 6.0 and later now use a font server independent of
# the X server to render fonts.

    FontPath   "unix/:-1"

EndSection

# **********************************************************************
# Server flags section.
# **********************************************************************

Section "ServerFlags"

    # Uncomment this to cause a core dump at the spot where a signal is
    # received.  This may leave the console in an unusable state, but may
    # provide a better stack trace in the core dump to aid in debugging
    #NoTrapSignals

    # Uncomment this to disable the <Crtl><Alt><BS> server abort sequence
    # This allows clients to receive this key event.
    #DontZap

    # Uncomment this to disable the <Crtl><Alt><KP_+>/<KP_-> mode switching
    # sequences.  This allows clients to receive these key events.
    #DontZoom

    # This  allows  the  server  to start up even if the
    # mouse device can't be opened/initialised.
    AllowMouseOpenFail

EndSection

# **********************************************************************
# Input devices
# **********************************************************************

# **********************************************************************
# Keyboard section
# **********************************************************************

Section "InputDevice"

    Identifier "Keyboard1"
    Driver      "Keyboard"
    Option "AutoRepeat"  "250 30"

    Option "XkbRules" "xfree86"
    Option "XkbModel" "pc105"
    Option "XkbLayout" "us"

EndSection

# **********************************************************************
# Pointer section
# **********************************************************************

Section "InputDevice"

    Identifier  "Mouse1"
    Driver      "mouse"
    Option "Protocol"    "IMPS/2"
    Option "Device"      "/dev/usbmouse"
    Option "ZAxisMapping" "4 5"
#    Option "Emulate3Buttons"
#    Option "Emulate3Timeout"    "50"

# ChordMiddle is an option for some 3-button Logitech mice

#    Option "ChordMiddle"

EndSection



Section "Module"

# This loads the DBE extension module.

    Load	"dbe"
    Load "glx"

# This loads the miscellaneous extensions module, and disables
# initialisation of the XFree86-DGA extension within that module.

    SubSection	"extmod"
	#Option	"omit xfree86-dga"
    EndSubSection

# This loads the Type1 and FreeType font modules

    Load	"type1"
    Load	"freetype"
EndSection

# **********************************************************************
# Monitor section
# **********************************************************************

# Any number of monitor sections may be present

Section "Monitor"
    Identifier "NEC|NEC MultiSync 6FG"
    VendorName "NEC"
    ModelName  "Unknown"


# HorizSync is in kHz unless units are specified.
# HorizSync may be a comma separated list of discrete values, or a
# comma separated list of ranges of values.
# NOTE: THE VALUES HERE ARE EXAMPLES ONLY.  REFER TO YOUR MONITOR'S
# USER MANUAL FOR THE CORRECT NUMBERS.
    HorizSync  30-96


# VertRefresh is in Hz unless units are specified.
# VertRefresh may be a comma separated list of discrete values, or a
# comma separated list of ranges of values.
# NOTE: THE VALUES HERE ARE EXAMPLES ONLY.  REFER TO YOUR MONITOR'S
# USER MANUAL FOR THE CORRECT NUMBERS.
    VertRefresh 47-150


# This is a set of extended mode timings typically used for laptop,
# TV fullscreen mode or DVD fullscreen output.
# These are available along with standard mode timings.

# Sony Vaio C1(X,XS,VE,VN)?
# 1024x480 @ 85.6 Hz, 48 kHz hsync
ModeLine "1024x480"    65.00 1024 1032 1176 1344   480  488  494  563 -hsync 
-vsync

# 768x576 @ 79 Hz, 50 kHz hsync
ModeLine "768x576"     50.00  768  832  846 1000   576  590  595  630
# 768x576 @ 100 Hz, 61.6 kHz hsync
ModeLine "768x576"     63.07  768  800  960 1024   576  578  590  616


EndSection



# **********************************************************************
# Graphics device section
# **********************************************************************

Section "Device"
    Identifier "Generic VGA"
    Driver     "vga"
EndSection

Section "Device"
    Identifier  "NVIDIA GeForce2 DDR (generic)"
    VendorName  "Unknown"
    BoardName   "Unknown"
    Driver      "nvidia"
#    VideoRam    32768
    # Clock lines


    # Uncomment following option if you see a big white block        
    # instead of the cursor!                                          
    #    Option      "sw_cursor"

    Option      "DPMS"  "on"
EndSection



# **********************************************************************
# Screen sections
# **********************************************************************


Section "Screen"
    Identifier "screen1"
    Device      "NVIDIA GeForce2 DDR (generic)"
    Monitor     "NEC|NEC MultiSync 6FG"
    DefaultColorDepth 16
    Subsection "Display"
        Depth       8
        Modes       "1280x1024" "1024x768" "800x600" "640x400"
        ViewPort    0 0
    EndSubsection
    Subsection "Display"
        Depth       16
        Modes       "1280x1024" "1024x768" "800x600" "640x480"
        ViewPort    0 0
    EndSubsection
    Subsection "Display"
        Depth       24
        Modes       "1024x768" "800x600" "640x480"
        ViewPort    0 0
    EndSubsection
    Subsection "Display"
        Depth       32
        Modes       "1024x768" "800x600" "640x480"
        ViewPort    0 0
    EndSubsection
EndSection


Section "ServerLayout"
    Identifier "layout1"
    Screen     "screen1"

    InputDevice "Mouse1" "CorePointer"

    InputDevice "Keyboard1" "CoreKeyboard"
EndSection

-- 
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There's a widow in sleepy Chester
  Who weeps for her only son;
There's a grave on the Pabeng River,
  A grave that the Burmans shun,
And there's Subadar Prag Tewarri
  Who tells how the work was done.
-------------------------------------