Version: unspecified (using KDE 4.5.0) OS: Linux System Settings does not show the reason why you can not enable desktop effects. Check attached screenshot. Reproducible: Didn't try
You forgot to attach the screenshot.
We do not need a screen shot, the issue is known.
*** This bug has been marked as a duplicate of bug 250865 ***
Bulk change: move all KWin kcm bugs to product kwin