求助～关于登录界面分辨率刷新率的老问题～

[tonry123]

装了显卡驱动后桌面的分辨率对头，就是登录界面的分辨率变成最大的分辨率了,好像变成1280*多少了，刷新率应该为60：请各位指点一下该如何改才对～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"
EndSection

Section "Screen"
Identifier "Default Screen"
Monitor "Configured Monitor"
Device "Configured Video Device"
DefaultDepth 24
EndSection

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

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