Dois Monitores no Ubuntu

# /etc/X11/xorg.conf (xorg 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 /etc/X11/xorg.conf manual page.
# (Type "man /etc/X11/xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following commands:
#
# cp /etc/X11/xorg.conf /etc/X11/xorg.conf.custom
# sudo sh -c 'md5sum /etc/X11/xorg.conf >/var/lib/xfree86/xorg.conf.md5sum'
# sudo dpkg-reconfigure xserver-xorg

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/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   "bitmap"
   Load   "dbe"
   Load   "ddc"
   Load   "dri"
   Load   "extmod"
   Load   "freetype"
   Load   "glx"
   Load   "int10"
   Load   "record"
   Load   "type1"
   Load   "vbe"
EndSection

Section "InputDevice"
   Identifier   "Generic Keyboard"
   Driver      "keyboard"
   Option      "CoreKeyboard"
   Option      "XkbRules"   "xorg"
   Option      "XkbModel"   "abnt2"
   Option      "XkbLayout"   "br"
   Option      "XkbVariant"   "abnt2"
   Option      "XkbOptions"   "abnt2"
EndSection

Section "InputDevice"
   Identifier   "Configured Mouse"
   Driver      "mouse"
   Option      "CorePointer"
   Option      "Device"      "/dev/ttyS1"
   Option      "Protocol"      "IntelliMouse"
   Option      "Emulate3Buttons"   "true"
   Option      "ZAxisMapping"      "4 5"
EndSection

Section "Device"
   Identifier   "ATI Radeon 9200SE"
   Driver      "ati"
   BusID      "PCI:1:0:0"
EndSection

Section "Device"
   Identifier   "Trident Microsystems TGUI 9440"
   Driver      "trident"
   BusID      "PCI:0:10:0"
EndSection

Section "Monitor"
   Identifier   "Serie 786NS"
   Option      "DPMS"
EndSection

Section "Monitor"
   Identifier   "FiveStar"
   Option      "DPMS"
EndSection

Section "Screen"
   Identifier   "Screen0"
   Device      "ATI Radeon 9200SE"
   Monitor      "Serie 786NS"
   DefaultDepth   16  
   SubSection "Display"
      Depth      16  
      Modes      "1024x768" "800x600" "640x480"
   EndSubSection
EndSection

Section "Screen"
   Identifier   "Screen1"
   Device      "Trident Microsystems TGUI 9440
   Monitor      "FiveStar"
   DefaultDepth   16
   SubSection "Display"
      Depth      16
      Modes      "1024x768" #"800x600" "640x480"
   EndSubSection
EndSection

Section "ServerLayout"
   Identifier   "Default Layout"
   Screen 0   "Screen0" 0 0
   Screen 1   "Screen1" RightOf "Screen0"
   InputDevice   "Generic Keyboard"
   InputDevice   "Configured Mouse" "CorePointer"
EndSection

Section "ServerFlags"
   Option "Xinerama" "true"
EndSection

Section "DRI"
   Mode   0666
EndSection