Charging iPhone with closed lid on mbp

I've been researching, but found nothing this specific so far. Related links:
- - This says it may or may not charge
- -closed.html - This says it should work since Leopard and if it's not working to reset the SMC should fix it (I haven't tried yet):
- This is not the same model, but for him it seems to not work anyway
- Suggests for dealing with closed lid, but requires external display, among other things that don't come to this case (or so I guess)
To me, experience showed that closing the lid with the iPhone already connected works fine. I'm using a macbook pro 2009, as already hinted elsewhere. It's 13'' if that makes any difference.
But if I have the computer sleeping in the bag and want to just plug the iPhone for charging convenience, then it doesn't work. I have to remove it, open the lid, wait for charging to begin, then I can safely close, sleep, put it back on the bag, and it will be charging.
So I wonder how this is supposed to work, and if I can "fix" this behavior. Anyone knows?

I actually solved it on my own luck. Oddly enough, just need to remove and re-plug.
Here, this is a small chart:
1- Computer with lid open, up and running with energy - whatever AC or not.
normal behavior, everything as expected: plug in iPhone it starts charging.
2- Computer with closed lid, sleeping as blinking light indicate and plugged in AC power.
normal behavior, everything as expected: plug in iPhone it starts charging.
3- Computer with closed lid for long time, unplugged from AC power, no cables on it whatsoever.
plug in iPhone - nothing happens.
unplug it and plug in again in either port - it starts charging!
If you close the lid and don't wait it gets to sleep (that is, white blinking light - if you want to be sure, wait till the computer cools down, if it was hot - that's sleep mode) you'll get normal behavior right on the first plug time. The trick of plugging again seem to work always from my tests. So this is a undocumented feature that took me freaking long enough to uncover!
Now it's aight!

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