As certainly you will know exists, in turn for the net, a remarkable amount of guides on the compilation of kde 4 from svn, but nobody, at least that I know, explains like qualifying the effects desktop of kwin; generally, when the System window is opened settings->Desktop is found to us of a desolating forehead to “Compositing is not supported on your system. Compositing was disabled at compile Time. Probably Xorg developement headers to were not installed “.
This happens because the following bookcases of development have not been settled: libxcomposite-dev, libavformat-dev.
If yours distro it is Gutsy, but creed also for Hardy is worth the same thing (will verify), enough a beautiful one sudo apt-get install libxcomposite-dev, libxdamage-dev; if you must still begin the compilation now you have only need of kdesvn-build (if been following a any guide sapete already of what I speak), various, to compilation already carried out, is necessary to cancel the /usr/src/kde4/kdelibs folder and ricompilare. At the end, and naturally if your graphical card has the acceleration 3D, here your effects:

It marks it near: