Bug#785739: mate-screensaver possibly not working with xmonad

[Raja R Harinath]

I have been experiencing the same issue, and I use xmonad.

There is also an upstream bug and a redhat bug with the same problem.

  https://bugzilla.redhat.com/show_bug.cgi?id=984333
  https://github.com/mate-desktop/mate-screensaver/issues/82