"Ubuntu 11.10 does not come with a default screen saver, and
even Gnome 3 provides nothing but a black screen when your system
is idle. For this reason, the only way to acquire a screensaver is
to install a third-party application. Hence, to get a screensaver
in Ubuntu 11.10, you can install XScreenSaver. It is the standard
screen saver collection shipped with many Linux and Unix
distributions, and is a perfect match for both Unity and Gnome 3.
In this post, we will tell you how to install XScreenSaver in