xscreensaver is the Linux Screen Saver Program.
For more information see:
Using xscreensaver with Mythtv
yum install xscreensaver*
For the user that will run the Mythtv-Frontend (mythtv), you need add .xscreensaver to the home directory of the user.
Now add the following lines.
timeout: 0:05:00 lock: False splash: False nice: 10 fade: True unfade: False fadeSeconds: 0:00:15 mode: one selected: 191
The two requirements for proper xscreensaver support are: