I've just installed xscreensaver instead of gnome-screensaver in Ubuntu 12.04 in gnome-session-fallback (Gnome Classic) mode. It works fine, but I have a problem: I put "xscreensaver -no-splash" command to the startup applications list.
But it doesn't start automatically, I have to run this command manually. I think that the problem is that it tries to start before I log in. So how can I start it automatically after login?