This is the compositing section from my ~/.kde/share/config/kwinrc
Quote:
[Compositing]
AnimationSpeed=3
Backend=OpenGL
CheckIsSafe=true
DisableChecks=false
Enabled=true
GLDirect=true
GLMode=TFP
GLTextureFilter=1
GLVSync=true
HiddenPreviews=5
OpenGLIsUnsafe=false
XRenderSmoothScale=false
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KDE will start with enable 3d effects option greyed out if OpenGLIsUnsafe=true.
At start up, by default KDE will check your OpenGL support (CheckIsSafe=true). If these checks fail, then
OpenGLIsUnsafe=true is set.
There have been reports of some ATI graphics working successfully if the KDE start up checks are disabled (DisableChecks=true).