[求救] 刷新率为0

[swayerr]

我刚装了ubuntu9.04，第一次进去的分辨率是1024×768,刷新率是70，第二次进去的时候就变成800×600了。于是我到网上找了一些教程，结果分辨率是改回1024×768了，但刷新率变成了0,我把代码贴上来，请帮我看看。
我的显卡型号:显卡 NVIDIA GeForce4 MX 440 with AGP8X;
显示器：HPC1775 17英寸。
Section "Device"
Identifier "Configured Video Device"
Option "DPMS"
HorizSync 40-83
VertRefresh 50-76
EndSection

Section "Screen"
Identifier "Default Screen"
Device "VIA Technologies, Inc. VT8378 [S3 UniChrome] Integrated Video"
Monitor "Generic Monitor"
DefaultDepth 24
SubSection "Display"
Depth 1
Modes "1024x768" "640x480"
EndSubSection
SubSection "Display"
Depth 4
Modes "1024x768" "640x480"
EndSubSection
SubSection "Display"
Depth 8
Modes "1024x768" "640x480"
EndSubSection
SubSection "Display"
Depth 15
Modes "1024x768" "640x480"
EndSubSection
SubSection "Display"
Depth 16
Modes "1024x768" "640x480"
EndSubSection
SubSection "Display"
Depth 24
Modes "1024x768" "640x480"
EndSubSection
EndSection

Section "Screen"
Identifier "Default Screen"
Monitor "Configured Monitor"
Device "Configured Video Device"
EndSection

[swayerr]

问题已经解决了，原来是我把一个参数设置错了，就是这个
Section "Device"
Identifier "Configured Video Device"
Option "DPMS"
HorizSync 40-83
VertRefresh 50-76
EndSection

应该是
Section "Monitor"。
现在我的分辨率是1024×768,刷新率是70
我把代码全部贴上来，记住，要把原来文件里然代码全部删除，这样才有效果。请先备份，后果自负。本人的电脑现在一切正常。

代码：

# 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 Video Device"
Option "DPMS"
HorizSync 40-83
VertRefresh 50-76
EndSection

Section "Screen"
Identifier "Default Screen"
Device "VIA Technologies, Inc. VT8378 [S3 UniChrome] Integrated Video"
Monitor "Generic Monitor"
DefaultDepth 24
SubSection "Display"
Depth 1
Modes "1024x768" "640x480"
EndSubSection
SubSection "Display"
Depth 4
Modes "1024x768" "640x480"
EndSubSection
SubSection "Display"
Depth 8
Modes "1024x768" "640x480"
EndSubSection
SubSection "Display"
Depth 15
Modes "1024x768" "640x480"
EndSubSection
SubSection "Display"
Depth 16
Modes "1024x768" "640x480"
EndSubSection
SubSection "Display"
Depth 24
Modes "1024x768" "640x480"
EndSubSection
EndSection

Section "Screen"
Identifier "Default Screen"
Monitor "Configured Monitor"
Device "Configured Video Device"
EndSection