i have mac os x 10.7.1 lion on a 2011 macbook pro. whenever i open the lid it will wake up for a few seconds then go right back to sleep. this is very annoying! does anyone know a fix to this?
this sometimes happens to me, also with lion, To fix this i just increase the brightness, and the displays automatically turns on, I dont know what this happens but that fixed it.
I meant what are your settings in System Preferences regarding when it sleeps. But I wouldn't worry about that. Instead...
Your best bet is to reset the SMC. It's fairly simple to do. I've pulled the directions from Apple's Knowledge Base article, and you can check it here for more information.
1. Shut down the computer.
2. Disconnect the MagSafe power adapter from the computer, if it's connected.
3. Remove the battery.
4. Press and hold the power button for 5 seconds.
5. Release the power button.
6. Reconnect the battery and MagSafe power adapter.
7. Press the power button to turn on the computer.
Another option is to call Apple Care (800.APL.CARE). They will walk you through a few things, probably, but it will beat two or four hours on the road. They can set up a repair and mail you a box to ship it to the repair center (the vast majority of portables left at retail stores go to the same place in the same way).