Problem with dual monitors since upgrade to W7

I am under W7 Enterprise32 bit with dual display (monitors) - a Lenovo L193pC (primary) and a Dell E177FP (secondary).

Since the upgrade to W7, I noticed that if I leave my PC unattended and locked for a long time (30 minutes and more), when I get back to him, I lost contact with my main screen: the monitor is on, but the screen is black.  I can only see the secondary display and windows cannot be moved from the second screen to the primary.  All I can do is to sign using the secondary screen, near everything I opened down and restart the PC.

I use a set of chips Intel G41 Express and a Microsft v6.1.7600.16385 driver for the primary monitor.

I noticed a few people reporting flickering monitors in a similar situation, but not quite the same thing as what I mean...

Anyone got any ideas how I can stop what is happening?  Is - this driver related?

Just to let you know that I solved this now.

It wasn't a driver issue, it was a computer setting.

When I put the PC display never sleep and the computer to sleep never it solved the problem.

Tags: Windows

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