supertux的OpenGL模式出问题

sunset_ayq

安装好了nvidia驱动（我的显卡是fx5200），后来我重启系统，就不能进supertux了，从终端输入suertux,出现以下提示：
root@ubuntu:~# supertux
Datadir: /usr/share/games/supertux
Xlib: extension "GLX" missing on display ":0.0".
Xlib: extension "GLX" missing on display ":0.0".

Warning: I could not set up fullscreen video for 640x480 mode.
The Simple DirectMedia error that occured was:
Couldn't find matching GLX visual
我用的是Ubuntu5.04,安装显卡驱动的过程如下
sudo apt-get install nvidia-glx
sudo apt-get install nvidia-settings
sudo cp /etc/X11/xorg.conf /etc/X11/xorg.conf_backup
sudo nvidia-glx-config enable
sudo gedit /usr/share/applications/NVIDIA-Settings.desktop
然后
在新增的文件内加入下面这几行

[Desktop Entry]
Name=NVIDIA Settings
Comment=NVIDIA Settings
Exec=nvidia-settings
Icon=
Terminal=false
Type=Application
Categories=Application;System;
请各位看看怎么搞啊