I'm having trouble getting twinview working with my Gefore FX 5200
heres the specs of my monitors


CRT Size - 19.0-inch (18" viewable image size)
CRT Pitch - 0.20 mm Hoz pitch
Max. Resolution - 1600 x 1200 @ 75 Hz
Horizontal Frequency - 30 kHz to 86 kHz
Vertical Frequency - 50 to 160 Hz
Video Clock Frequency - 145 MHz

my LCD

Display Area (H x V) - 18.1" diagonal; (14.06"x11.25")
Pixel Pitch (W x H) - 0.2805mm x 0.2805mm
Optimum Resolution - 1280x1024
Maximum Displayable Colors - 16.7M
Frequency - Fh:31.5~80kHz max; fv:60~75Hz
[quote]
My card
Geforce FX 5200
256 megs of ram

here's the XF86Config-4 file
Code:
# 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"

        # paths to defoma fonts

	FontPath	"/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"

	FontPath	"/var/lib/defoma/x-ttcidfont-conf.d/dirs/CID"

EndSection



Section "Module"

	# Load	"GLcore"

	Load	"bitmap"

	Load	"dbe"

	Load	"ddc"

	# Load	"dri"

	Load	"extmod"

	Load	"freetype"

	Load	"glx"

	Load	"int10"

	Load	"record"

	Load	"speedo"

	Load	"type1"

	Load	"v4l"

	Load	"vbe"

	Load	"xtt"

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/input/mice"

	Option		"Protocol"		"ImPS/2"

	Option		"Emulate3Buttons"	"true"

	Option		"ZAxisMapping"		"4 5"

EndSection



Section "Device"

	Identifier	"NVIDIA Corporation NV34 [GeForce FX 5200]"

	Driver	"nvidia"

	BusID		"PCI:1:0:0"

EndSection



Section "Monitor"

	Identifier	"Generic Monitor"

	HorizSync	30-86

	VertRefresh	50-160

	Option		"DPMS"



	Option "TwinView"

	Option "SecondMonitorHorizSync"     "30-86"

	Option "SecondMonitorVertRefresh"   "50-160"

	Option "TwinViewOrientation" "RightOf"

      Option "Xinerama" "on"

		

EndSection



Section "Screen"

	Identifier	"Default Screen"

	Device		"NVIDIA Corporation NV34 [GeForce FX 5200]"

	Monitor		"Generic Monitor"

	DefaultDepth	24

	SubSection "Display"

		Depth		1

		Modes		"1280x1024" "1024x768" "800x600" "720x400" "640x480"

	EndSubSection

	SubSection "Display"

		Depth		4

		Modes		"1280x1024" "1024x768" "800x600" "720x400" "640x480"

	EndSubSection

	SubSection "Display"

		Depth		8

		Modes		"1280x1024" "1024x768" "800x600" "720x400" "640x480"

		ViewPort    0 0

	EndSubSection

	SubSection "Display"

		Depth		15

		Modes		"1280x1024" "1024x768" "800x600" "720x400" "640x480"

		ViewPort    0 0

	EndSubSection

	SubSection "Display"

		Depth		16

		Modes		"1280x1024" "1024x768" "800x600" "720x400" "640x480"

		ViewPort    0 0

	EndSubSection

	SubSection "Display"

		Depth		24

		Modes		"1280x1024" "1024x768" "800x600" "720x400" "640x480"

		ViewPort    0 0

	EndSubSection

EndSection



Section "ServerLayout"

	Identifier	"Default Layout"

	Screen	"Default Screen" 0 0

	InputDevice	"Generic Keyboard"

	InputDevice	"Configured Mouse"

EndSection



# Section "DRI"

# 	Mode	0666

# EndSection