Make centered content design with adoption for mobile devices.
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* Deactiate screensaver.
** xscreensaver.
/usr/bin/xscreensaver-command -deactivate
** gnome-screensaver.
$ gnome-screensaver-command -p
http://live.gnome.org/GnomeScreensaver/FrequentlyAskedQuestions#Is_there_a_way_to_perform_actions_when_the_screensaver_activates_or_deactivates.3F__Or_when_the_session_becomes_idle.3F
** Watch video without screensaver.
$ mplayer −heartbeat−cmd "xscreensaver-command -deactivate" $file
$ mplayer -heartbeat-cmd "gnome-screensaver-command -p" $file