Lock on screensaver has gone

[Ambrogio]

Hi all,

I was configured a casual screensaver with lock (ask for password) after
5 sec.

It worked for years...

Yesterday I played (in hours of annoing office doing nothing) with some
screensaver to see what is the most beautifull. :-)

I choosed the black screen :-) but lock is not working
Clicking on lock session on the panel it works, but after minutes from
screensaver starts, password is not asked.

I'm using KDE

Bye
 Ambrogio