KDE 4.0.4: No screensaver unless

[Andrea]

Mike wrote:
> Rex Dieter <rdieter <at> math.unl.edu> writes:
> 
>> kdeartwork and kdeartwork-extras contain most of the kde screensavers.  Are
>> either of these installed on your system?
> 
> Thanks Rex - in fact kdeartwork was installed, but kdeartwork-extras was not.
> After installing the latter a whole raft of screensavers now are available
> in the system-settings area. I was surprised this was not installed by default
> during F9 install but anyway I can now play with it... 
> 

To me it did not make any difference.
Screensaver only starts after re applying it.

Any idea?