jaymeeduardo = yes, I thought it was solved, but there are some strange things. After ticking that option my first sleep under power worked, but on others just black screen. And, like you, I discovered if you pull the power plug after you have asked it to sleep then it will go to sleep. Put power plug back in and it will stay asleep until you wake it up normally.
For definite though when the battery patch is NOT there, sleep is always normal. So we need to maybe look to the DSDT battery patch or perhaps the battery kext? I did try just trashing the battery kext but it did not seem to solve the problem, so maybe an alternative battery patch is needed or there is something else in the DSDT that needs to be patched but is not there.
