I have used xscreensaver for years; always liked it. Mint screensaver will work if you install xscreensaver, start the daemon by starting screensaver-demo. Then you can make the settings for a particular screensaver, like gl-slideshow, selecting an appropriate file directory, and so on. Then test it. Obviously, it is simpler to just use Xscreensaver itself and turn of Mint's version; just my opinion.
Breaks the Lock Screen command and some Power Manager functionality on Mint 17 XFCE, and interrupts full-screen applications without keyboard & mouse input (doesn't detect other inputs). If you want to stare at pretty patterns or you're simple enough to be amused by a bouncing 3D cow, this is for you. If you actually want to lock your screen to keep your contacts' confidential emails safe while taking a piss, use gnome-screensaver instead.
