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

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-xfree86Section "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"EndSectionSection "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"EndSectionSection "InputDevice"    Identifier      "Generic Keyboard"      Driver          "keyboard"      Option          "CoreKeyboard"  Option          "XkbRules"      "xfree86"       Option          "XkbModel"      "pc104" Option          "XkbLayout"     "us"EndSectionSection "InputDevice"     Identifier      "Configured Mouse"      Driver          "mouse" Option          "CorePointer"   Option          "Device"                "/dev/input/mice"       Option          "Protocol"              "ImPS/2"        Option          "Emulate3Buttons"       "true"  Option          "ZAxisMapping"          "4 5"EndSectionSection "Device" Identifier      "NVIDIA Corporation NV34 [GeForce FX 5200]"     Driver  "nvidia"        BusID           "PCI:1:0:0"EndSectionSection "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"              EndSectionSection "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 EndSubSectionEndSectionSection "ServerLayout"   Identifier      "Default Layout"        Screen  "Default Screen" 0 0    InputDevice     "Generic Keyboard"      InputDevice     "Configured Mouse"EndSection# Section "DRI"#    Mode    0666# EndSection