Ubuntu9.40分辨率，帮忙看下那里 出错

[sheng9976]

我的现在 分辨率设置里面有1024*768。可改变这个之后重启又回到800*600，我是菜鸟中的菜，清高手帮忙看下，要怎么 修改。谢谢

# xorg.conf (X.Org 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 xorg.conf manual page.
# (Type "man 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.
#
# Note that some configuration settings that could be done previously
# in this file, now are automatically configured by the server and settings
# here are ignored.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
# sudo dpkg-reconfigure -phigh xserver-xorg

Section "Monitor"
Identifier "Configured Monitor"
Option "DPMS"
HorizSync 30-81
VertRefresh 56-75
EndSection

Section "Screen"
Identifier "Default Screen"
Monitor "Configured Monitor"
Device "Configured Video Device"
DefaultDepth 24
SubSection "Display"
Depth 16
Modes "1024x768" "832x624" "800x600" "720x400" "640x480"
EndSubSection
SubSection "Display"
Depth 24
Modes "1024x768" "832x624" "800x600" "720x400" "640x480"
EndSubSection
EndSection

Section "Module"
Load "glx"
Disable "dri2"
EndSection

Section "Device"
Identifier "Configured Video Device"
Driver "nvidia"
EndSection

[sheng9976]

本来是菜，现在又第一次 ] 玩Ubuntu，先说下，除了分辨率，现在其他全部正常。。。