Spontaneous Screen Secession

So every so often I will be say, playing a game, or perhaps printing a paper, or even maybe doing nothing at all when out of NOWHERE, my screen for my E1505 Dell notebook apparently "turns off". I proceed in moving the mouse, ctrl+alt+deleting, eventually coming to restarting the whole mess to fix the problem. A restart is the only thing that seems to turn the monitor back on. What do you think could cause this problem? Is is perhaps a driver issue? I recently downloaded a Radeon Omega driver (which actually saved my gaming life) but in return I get the spontaneous screen shutdown. Any advice?