ubuntu在登录界面键盘鼠标无法使用

这个问题应该是由于从8.04升级到8.10带来的问题。。。升级完后的第一次开机就出现这种情况了，从网上找了下修正的办法，如下：

在登录界面的时候按Alt + F1进入命令行界面，
打开/etc/X11/xorg.conf添加下面的红色字部分：

# 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.
#
# 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 "InputDevice"
    Identifier    "Generic Keyboard"
    Driver        "kbd"
    Option        "XkbRules"    "xorg"
    Option        "XkbModel"    "pc105"
    Option        "XkbLayout"    "us"
EndSection

Section "InputDevice"
    Identifier    "Configured Mouse"
    Driver        "mouse"
    Option        "CorePointer"
EndSection

Section "Device"
    Identifier    "Configured Video Device"
EndSection

Section "Monitor"
    Identifier    "Configured Monitor"
EndSection

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

Section "ServerLayout"
    Identifier    "Default Layout"
    Inputdevice "Generic Keyboard"
    Inputdevice "Configured Mouse"
    Screen        "Default Screen"

    EndSection

按照上面这个文件的内容我的键盘和鼠标是正常工作的，如果有其他配件在开机的时候不能正常工作的话应该也可以看看这个文件。