Version:           1.0 (using KDE 4.6.1) 
OS:                Linux

The "General"-Tab has a warning: "Desktop effects are not available on this system due to the following technical issues:" But no issues are displayed.

The "Enable desktop effects" checkbox is enabled, but inactive.

Composing State: "Desktop effects are active"

The list of effects on the "All Effects"-Tab is empty.

"Advanced"-Tab: Compositing type is set to XRender. Trying to set it to OpenGL failes with the error-message: 

"Failed to activate desktop effects using the given configuration options. Settings will be reverted to their previous values.

Check your X configuration. You may also consider changing advanced options, especially changing the compositing type."

Desktop effects are indeed working.

I remember sometime in the past everything worked normally.

Reproducible: Always




OS: Linux (x86_64) release 2.6.37.1-1.2-desktop
Compiler: gcc
Distribution: OpenSUSE 11.4
Graphics-driver: Nouveau

This bug already existed with
 OpenSUSE 11.3
 KDE 4.5.x
 proprietary NVidia-driver
on the same machine.