I looked and this may have been covered before but I did not see it.
When I let my computer sit for several minutes the screensaver will come on and then after another few minutes the computer goes into sleep, When I move the mouse or hit a button to bring it awake, it goes to a black screen or background art and the only way to fix it is reset the computer. I have also tried bringing it awake with the power button but it is a 50/50 chance of working or getting the above mentioned screens.
Any thoughts??