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Yesterday I upgraded Ubuntu from 11.04 to 11.10.

There is a nice effect of alt tab switcher with windows preview in 11.10 but with my system only simple alt tab switcher is working without effects.

I have Nvidia 1GB graphics card. I was using ubuntu classic with 11.04 as driver was not working with it but with 11.10 now nvidia driver is working and I want all unity effects.

I have installed compiz setting manager but can't able to enable alt tab switcher effects from anywhere.

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Can you confirm if you're using Unity 2D or Unity 3D? more on that here - – James Oct 14 '11 at 18:02
I am using unity 3d – Gaurav Padia Oct 14 '11 at 18:28
oh I am really sorry. I am using unity 2D. Really sorry I told you without checking your provided link. So unity 2D don't have alt tab switcher effects, right ? I think I have problem with my nvidia driver. – Gaurav Padia Oct 14 '11 at 18:35
Ah, ok. Unity 2D does not have the fancy alt-tab affects unfortunately. – James Oct 14 '11 at 18:37

The answer to your question is as follows:

It's not possible to have the super-slick Alt-Tab switcher because you're using Unity 2D and not 3D.

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