delay after opening lid display dark until key pressed okay so my MBP Mid 2010 was took a little tumble (it was in a felt sleeve which was inside a backpack) today and since has been acting weird.

when i open the lid, the login screen does not come back on automatically, i have push a key, move a finger or two on trackpad and only then does the display get powered

what to do? I am on OSX 10.8.5 and non SSD, 4GB Ram.
Plz help!
Check that pmset -g hibernatemode command in Terminal gives you 3 or 0 and not any other value. If it gives you something else, execute pmset hibernatemode 3 (this is the correct default).

Sometimes these settings go wrong for unknown reason.