上周在用单位的闲置硬盘装了个CentOS 5.4 x64，发现不能像win7一样默认识别双屏。
自己搞了搞总是失败，今天上午在网上google了一下，有高人说需要这么办。
Section "Screen"下面添加如下内容：
Option "TwinView"--------估计是告诉X使用双屏显示。
Option "MetaModes" "1280*1024 1280*1024"--------告诉X显示的分辨率。
Option "TwinView Orientation" "RightOf"--------估计这是告诉X附加的显示器在右侧。
全部配置内容如下：
# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig: version 1.0 (buildmeister@builder58) Fri Aug 14 18:33:37 PDT 2009
# Xorg configuration created by pyxf86config
Section "ServerLayout"
Identifier "Default Layout"
Screen 0 "Screen0" 0 0
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
EndSection
Section "InputDevice"
# generated from default
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/input/mice"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection
Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
EndSection
Section "Monitor"
Identifier "Monitor0"
VendorName "Unknown"
ModelName "Unknown"
HorizSync 28.0 - 33.0
VertRefresh 43.0 - 72.0
Option "DPMS"
EndSection
Section "Device"
Identifier "Videocard0"
Driver "nvidia"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Videocard0"
Monitor "Monitor0"
DefaultDepth 24
###
Option "TwinView"
Option "MetaModes" "1280*1024 1280*1024"
Option "TwinView Orientation" "RightOf"
###
SubSection "Display"
Viewport 0 0
Depth 24
EndSubSection
EndSection
非图形界面搞，然后启动X就行了。
(*^__^*)