FOR SCREENSAVER:
* use [Un]Inhibit together as a SimulateUserActivity workalike
+ * disablegss.py from http://ubuntuforums.org/showthread.php?t=284804
+ * this method doesn't work either. tried in gss-poke.py
* xdg-screensaver suspend / resume to SimulateUserActivity
* http://tronche.com/gui/x/xlib-tutorial/2nd-program-anatomy.html
* http://portland.freedesktop.org/xdg-utils-1.0beta3/xdg-screensaver.html