Currently Being ModeratedJul 27, 2012 8:47 AM (in response to SnakeDog)
For anyone who cares, I think the problem is that in security control panel there is a setting to lock the computer after a time period. When you select this and a password to wake from sleep/screen saver, you end up having to log in twice. Once into the computer, the other into your account.
Why the screen was black, I don't know.