baixe o xorg.conf
aki
veja o arquivo a baixo:
##########################################################################
# Sample XF86Config file for NVIDIA XFree86 drivers.
#
# Refer to the XF86Config(4/5) man page for details about the format of
# this file.
#
# Be sure to replace the monitor values with correct values for your
# monitor!
##########################################################################
#Section "Files"
# RgbPath "/usr/X11R6/lib/X11/rgb"
# 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 "kbd"
Option "CoreKeyboard"
Option "XkbRules" "xorg"
Option "XkbModel" "abnt2"
Option "XkbLayout" "br"
Option "XkbVariant" "abnt2"
EndSection
#
# Pointer section
#
Section "InputDevice"
Identifier "Mouse1"
Driver "mouse"
Option "Protocol" "IMPS/2"
Option "Device" "/dev/psaux"
Option "ZaxisMapping" "4 5"
EndSection
##########################################################################
# Module section
##########################################################################
Section "Module"
Load "dbe"
# Load the glx module.
Load "glx"
Load "extmod"
Load "type1"
Load "freetype"
EndSection
##########################################################################
# Monitor section
##########################################################################
Section "Monitor"
Identifier "MyMonitor"
VendorName "Mitsubisi"
ModelName "Diamond Plus 120u"
# be sure to replace these values with values appropriate for your
# monitor!
HorizSync 31-82
VertRefresh 55-120
# 3840x2400 @ 12Hz for IBM's T221 FlatPanel
# Modeline "3840x2400" 148.0 3840 3944 4328 4816 2400 2401 2404 2418
EndSection
##########################################################################
# Graphics device section(s)
##########################################################################
Section "Device"
Identifier "NV AGP TwinView"
VendorName "nvidia"
Driver "nvidia"
# update this with the PCI id of your card. Consult the output
# of the 'lspci' command. The BusID is usually optional when
# only using one graphics card.
BusID "PCI:1:0:0"
# sample twinview setup
Option "TwinView"
# be sure to replace the HorizSync and VertRefresh with correct values
# for your monitor!
Option "SecondMonitorHorizSync" "31-82"
Option "SecondMonitorVertRefresh" "55-120"
Option "TwinViewOrientation" "RightOf"
Option "MetaModes" "1280x1024,1280x1024" # 1280x1024,1280x1024; 1024x768,1024x768"
Option "ConnectedMonitor" "crt,crt"
EndSection
##########################################################################
# Screen sections
##########################################################################
#
# screen section for an nvidia AGP card
#
Section "Screen"
Identifier "Screen AGP TwinView"
Device "NV AGP TwinView"
Monitor "MyMonitor"
DefaultColorDepth 24
Subsection "Display"
Depth 8
Modes "1280x1024" "1024x768" "800x600" "640x400"
EndSubsection
Subsection "Display"
Depth 16
Modes "1280x1024" "1024x768" "800x600" "640x480"
EndSubsection
Subsection "Display"
Depth 24
Modes "1280x1024" "1024x768" "800x600" "640x480"
EndSubsection
EndSection
##########################################################################
# ServerLayout sections
# (invoke using the '-layout' option of 'startx'.
##########################################################################
#
Section "ServerLayout"
Identifier "AGPTwinView"
Screen "Screen AGP TwinView"
InputDevice "Mouse1" "CorePointer"
InputDevice "Keyboard1" "CoreKeyboard"
EndSection
#
# 2 cards, one agp twinview and one pci (3 monitors total)
#