Comment 7 for bug 555870

I disabled fading using the attached patch. Solves problem for me but it is not a fix, just a workaround with minimal functional impact.

cd /tmp
wget [url for patch]
apt-get source gnome-screensaver
cp 99_wsgc_fixes3.patch gnome-screensaver-2.30.0/debian/patches/
cd gnome-screensaver-2.30.0
fakeroot dpkg-buildpackage
[note you may have to install a fair amount of packages to get this to build, just read the warning for details]
cd ..
ls *.deb
sudo dpkg -i [name of .deb file above]
killall gnome-screensaver
gnome-screensaver