Seeing the same here. Using AMD64 intrepid on my Acer 5520G laptop.
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Gnome-screensaver not working in Ubuntu 8.10
https://bugs.launchpad.net/bugs/285911
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*** This bug is a duplicate of bug 278112 ***
https://bugs.launchpad.net/bugs/278112
Found out this is dublicate of bug #278112 and this bug is already being in
fixed list.
see https://bugs.launchpad.net/ubuntu/intrepid/+source/compiz/+bug/278112
** This bug has been marked a duplicate of