disabling rendering in root window for KDE

["Florian Dorpmueller" <dorpmueller@hotmail.com>]

Using torsmo or conky on a KDE Desktop requires to disable rendering in the 
root window.

I have spend about one hour for finding this option but I can't. Anybody 
here around who knows how to disable the rendering (kcontrol and then?)

Thanks in advance,
Flori