I have done all the updates as suggested but still get a "black" screen and no screensaver. It does power the monitor off correctly though after 30 minutes.
I went through my startup applications and the closest I could find was "StartScreenSaverDaemon"...
Am I missing something?
Started working. I have no idea why....was at a black screen all day... Thanks anyway!
I spoke 2 soon. After a reboot, it has stopped working again.