Comment 5 for bug 490742

Indeed, I have had this same issue too for quite some time on Macbook 4,1.

I find sometimes, I'll tell the machine to resume and it'll take up to 20seconds before the screen backlight even comes on. Then, I often start entering my password to unlock and the machine suspends again. I have to press the power button then to resume, finish entering my password and I'm back - the whole process taking in the neighborhood of 40 - 60 seconds.