carte agp tnt2m64 :  
 
 Fabricant: nVidia Corporation
 Modèle: TNT2 Vanta [NV6]
 Type de bus: PCI <<<<<<<<<<<<<< BIZZARE NON ? (carte agp) sur 1:0:0
 
carte pci s3 :
 
Fabricant: S3 Inc.
 Modèle: Trio64 (generic) 86c764/765 [Trio32/64/64V+]
 Type de bus: PCI
 sur 0:12:0
 
carte dxr3 :
 
Fabricant: Sigma Designs, Inc.
 Modèle: REALmagic Hollywood Plus DVD Decoder
 Type de bus: PCI
 
 
 
voila alors le os c un mdk 8.1 et je men sors pas
 malgre les bons conseil de lea !
 
ds le mdk control center il me propose de cfgurer les cartes graphiques indepandements ! mais ca fe tout foirer ossi
 
 
 une idee ?
 
 
je rajoute mon fichier de conf Xfree
 
jne ne trouve pas mon erreur par rapport au expli du site  
 
 je nai aucun mssge derreur non plus  
 
 mon 2ém ecran n affiche rien tt simplement (pas de signal)
 
 
 # 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> server abort sequence
 # This allows clients to receive this key event.
 #DontZap
 
# Uncomment this to disable the <Crtl><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" "be"
 
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"
 
 
 # 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 "Iiyama MA901U, VisionMaster Pro 452"
 VendorName "Iiyama"
 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 30.0-96.0
 
 
 # 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 50.0-180.0
 
 
 # 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
 
Section "Monitor"
 Identifier "CTX"
 VendorName "CTX"
 ModelName "15pouces"
 
HorizSync 30-60
 VertRefresh 50-100
 
EndSection
 
 
 # **********************************************************************
 # Graphics device section
 # **********************************************************************
 
Section "Device"
 Identifier "RIVA TNT2"
 VendorName "Unknown"
 BoardName "Unknown"
 BusID "1:0:0"
 Driver "nv"
 # VideoRam 4096
 # Clock lines
 
 
 # Uncomment following option if you see a big white block  
# instead of the cursor!  
# Option "sw_cursor"
 
Option "DPMS" "on"
 EndSection
 
Section "Device"
 Identifier "S3 Virge"
 Driver "s3virge"
 BusID "0:12:0"
 EndSection
 
# **********************************************************************
 # Screen sections
 # **********************************************************************
 
 
 Section "Screen"
 Identifier "screen1"
 Device "RIVA TNT2"
 Monitor "Iiyama MA901U, VisionMaster Pro 452"
 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 "Screen"
 Identifier "screen2"
 Device "S3 Virge"
 Monitor "CTX"
 DefaultColorDepth 16
 Subsection "Display"
 Depth 8
 Modes "1024x768" "800x600" "640x400"
 ViewPort 0 0
 EndSubsection
 Subsection "Display"
 Depth 16
 Modes "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"
 Screen "screen2" RightOf "screen1"
 
InputDevice "Mouse1" "CorePointer"
 
InputDevice "Keyboard1" "CoreKeyboard"
 EndSection

http://www.linuxdoc.org/HOWTO/Xinerama-HOWTO.html
 
voila