环境：Ubuntu 9.04
我的笔记本的Intel集成显卡的型号是Intel Cooperation Mobile 945GM。如果完全按照上面的方法配置会导致播放电影是屏幕定住(freeze)，鼠标和键盘都不响应(SysReq都不起作用)。我把原xorg.conf配置文件中的
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Option “AccelMethod” “UXA”
Option “AccelMethod” “UXA”
去掉之后，这个问题就解决了。
但还有另一个问题，就是我按Ctrl+Alt+Fx(x=1,2,...,6)不能切换到其他的终端。目前这个问题还没解决。
附：
I believe a lot folks have the same problem as I have - the performance of intel graphic card is very low in ubuntu 9.04.
Some people say enabling UXA can solve the problem. But I found UXA is very unstable.
What you are expected to do is to update the kernel to 2.6.30 or later version.
Choose one version here.
download and install the packages in order as below
linux-headers-2.6.30-020630_2.6.30-020630_all.deb
linux-headers-2.6.30-020630rc5-generic_2.6.30-020630_i386.deb
linux-image-2.6.30-020630rc5-generic_2.6.30-020630_i386.deb
then reboot your system.