After all this.. it clears up then SNAP all goes back except backlighting on keyboard...

At first with lion upgrade it started only doing the random black screen of death for a week or so.. then more often... I read and read about it possibly being firmware or software glitch.. but in fact it got much worse... now I cannot even open computer except with it set to the nvidia chipset, no sleep enabled, and also all hot corners and screensavers ,and screen dimming.. all have neg effect... Im currently on about a 5 minute run where it hasn't crashed but Im expecting it soon!