Launch Compiz with Classic Desktop?

[terryeden]

My machine ran Compiz perfectly on 9.04. Sadly, it's too old to run Unity.

I've switched back to Classic Desktop - how do I get Compiz to run automatically? At the moment, I'm opening a terminal and running

compiz --replace

When I go to System -> Preferences -> Appearance, I don't see the "Enable Desktop Effects" option that I used to. Is there any way I can get this back?

I'm using the NVIDIA accelerated graphics driver (version 173)

Thanks for any help

[Krytarik]

In Natty 11.04, there is no "Visual Effects" tab in "Appearance" anymore, because whether Compiz is run or not is now determined by the session settings, and respective support checks.

Please see this guide on (1) seeing the results of those checks, and (2) skipping them if needed:
http://ubuntu4beginners.blogspot.com/2011/05/force-unity-compiz-to-run-natty-narwhal.html

Greetings.