Screensaver starts during fullscreen Rhythmbox visualization

Submitted by Murat Güneş

Please describe the problem: This bug has been reported in Ubuntu as https://bugs.launchpad.net/ubuntu/+source/rhythmbox/+bug/174315 :

"Screensaver (blank screen) activates when playing visualizations fullscreen in rhythmbox.

Scenario: Matt is having a party. Matt puts vis on fullscreen. Monitor turns black. Matt is upset."

Steps to reproduce:

Actual results:

Expected results:

Does this happen every time?

Other information:

Version: 0.11.x