请先安装显卡驱动
# vi /etc/X11/xorg.conf
##Add the following codes:
Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "Monitor Model"
HorizSync 28.0 - 70.0
VertRefresh 56.0 - 75.0
EndSection
Section "Device"
Identifier "Card0"
Driver "vesa"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Card0"
Monitor "Monitor0"
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1280x1024" "1024x768" "800x600"
EndSubSection
EndSection
Then，Reboot the computer.
1. 执行 gtf 1440 900 60 -x
# 1440x900 @ 60.00 Hz (GTF) hsync: 55.92 kHz; pclk: 106.47 MHz
Modeline "1440x900_60.00" 106.47 1440 1520 1672 1904 900 901 904 932 -HSync +Vsync
2. 将 Modeline 那一行，复制到 /etc/X11/xorg.conf 文件中的 "Monitor" 段：
Section "Monitor"
Identifier "Monitor0"
ModelName "LCD Panel 1440x900"
HorizSync 31.5 - 56.0
VertRefresh 56.0 - 65.0
Option "dpms" "false"
Option "IgnoreEDID" "true"
Modeline "1440x900_60.00" 106.47 1440 1520 1672 1904 900 901 904 932 -HSync +Vsync
EndSection
3. 更改 /etc/X11/xorg.conf 的 “Screen" 段，关键是：Modes "1440x900_60.00" 这一段要和上面的 Modelline 后的那个名字一样。
Section "Screen"
Identifier "Screen0"
Device "Videocard0"
Monitor "Monitor0"
DefaultDepth 16
SubSection "Display"
Viewport 0 0
Depth 16
Modes "1440x900_60.00"
Virtual 1440 900
EndSubSection
EndSection
4. 重启Xwindow.
