How do I enable visual effects my desktop?

Using Ubuntu 10.10, I am having some issues with enabling the visual effects on my system. It doesn't allow me to use the normal & the extra options. It checks for the drivers then it says that the driver is not found.

My laptop model is Compaq PresarioV2000.

How do I enable the visual effects?

Presumably your graphics card (Intel GM855 I guess) is not too well supported from the kernel in Ubuntu 10.10 (see Intel 8xx Issues). To get an idea on how to solve issues you may also have a look at this thread from Ubuntuforums.

Downloading drivers from a manufacturer website is not recommended for unexperienced users. It is only rarely needed anyway. You would need a detailed how-to for the installation process and an additional proof from the community that it's really working with your Ubuntu release.

You already check the System / Administration / Additional Drivers?