Hi, I'm using an early 2011 15" MBP with Lion 10.7.2 installed. Now, I don't usually turn it off, just put it to sleep, but when I do turn it off and then turn it on again later that day or another day, some things don't work. The things I've noticed not working are the sound (system preferences claim there are no input or output devices connected), the USB ports (again, no input devices) and from time to time, bluetooth. The first few times it happened, I ran permission and disk checks, fixed a couple of permissions and rebooted, it would work perfectly. On later occasions, there would be no errors whatsoever, and the reboot would fix the problems. It's really a bother to have to reboot the computer as soon as I turn it on >_> has anyone had this happen to them? I think it might be a problem with some drivers not loading properly and whatnot, but I can't say for sure.