Screensavers starting randomly after upgrade to OS X Lion
The Screen Saver options in OS X Lion are no different from those offered in Snow Leopard, and like Snow Leopard are available to configure in the Desktop & Screen Saver system preferences. As a result, you should expect the screensavers to behave as they did in Snow Leopard; however, a few people are noticing after upgrading to Lion that their screensavers seem to be randomly activating.
If this problem is happening to you, first try adjusting some of your Screen Saver settings by either changing the screensaver, adjusting its activation time, or setting various hot corners that you may … Read more