[求助］ATI Radeon 9600pro 的黑屏问题

[everplayer]

本人是ubuntu新手。
［问题描述］安装ubuntu后前几次重启正常。打开桌面特效后正常运行若干小时。重启，登录后立即死锁。之后重启都是登录后黑屏+死锁。只有选择 Failsafe GNOME模式可以正常登录。使用若干小时之后，打开sudoku游戏时再次黑屏+死锁。之后重启选择 Failsafe GNOME模式仍然可以正常登录使用。

［设置状况］
这是 xorg.conf 文件：

# 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 "ServerLayout"
Identifier "Default Layout"
Screen 0 "aticonfig-Screen[0]-0" 0 0
EndSection

Section "Files"
EndSection

Section "Module"
Load "glx"
EndSection

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 "Monitor"
Identifier "aticonfig-Monitor[0]-0"
Option "VendorName" "ATI Proprietary Driver"
Option "ModelName" "Generic Autodetecting Monitor"
Option "DPMS" "true"
EndSection

Section "Device"
Identifier "aticonfig-Device[0]-0"
Driver "fglrx"
Option "VideoOverlay" "on"
Option "OpenGLOverlay" "off"
BusID "PCI:1:0:0"
EndSection

Section "Screen"
Identifier "aticonfig-Screen[0]-0"
Device "aticonfig-Device[0]-0"
Monitor "aticonfig-Monitor[0]-0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
EndSubSection
EndSection

按照置顶帖，执行以下命令的返回信息：
执行：
glxinfo |grep -e 'direct' -e 'OpenGL'
显示：
direct rendering: Yes
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: ATI RADEON 9600 Series
OpenGL version string: 2.1.8087 Release
OpenGL extensions:

执行：
fglrxinfo
显示：
display: :0.0 screen: 0
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: ATI RADEON 9600 Series
OpenGL version string: 2.1.8087 Release

执行：
glxgears
结果：
黑屏＋死锁

执行：
fgl_glxgears
结果：
黑屏＋死锁

［另外］安装了ati driver for linux之后，applications->其他->ATI Catalyst control center点击没有任何反应。

请高手帮忙解决，非常感谢。