How can I remove Compiz?

Solution 1:

Before removing Compiz you might wanto to try and reset it

1.Press Alt + ctrl + F1

2.Login using your username and password

3.Reset compiz by executing gconftool-2 --recursive-unset /apps/compiz-1

4.Reset unity , by executing unity --reset

5.Optionally you can reset launcher icons by executing unity --reset-icons

6.Press Alt + ctrl + F7 to get back to login screen. However I recommend a restart by executing sudo reboot. Let us know if it worked.

Cerdits to Web-E

sudo apt-get purge compiz compiz-plugins-main-default libcompizconfig0

Warning: Removing compiz also removes the packages unity & ubuntu-desktop.

Warning: Removing libcompizconfig0 also removes ubuntu-tweak.

Thus you will lose the ability to log into the unity or unity-2d desktops.

Source

More info here: How can I remove and re-install Unity?

And here: Ubuntu 12.04. Compiz Failure. Computer has nothing to use