iMac Freeze After Display Sleep?

Discussion in 'Mac OS X Lion (10.7)' started by evangw, Jul 4, 2011.

  1. evangw, Jul 4, 2011
    Last edited: Jul 4, 2011

    evangw macrumors regular

    Feb 9, 2008
    I installed Lion GM on my Macbook Air with no problems, but when I installed it on my late 2009 27 iMac, I noticed that the computer will not wake from display sleep (or sleep) properly. If I sleep the display (shift-command-eject) or put the computer to sleep, when I try to wake it back up, the monitor will come back on and the harddrive will work, but the computer remains completely unresponsive.

    The computer is working because I can hear new emails come in, etc, but the display is completely frozen, and will not even respond to further commends (e.g. I cannot turn the display off with a second shift-command-eject).

    Has anyone had this problem or any ideas? I guess I'll start removing startup items and see what happens.

    E: The computer works properly in safe mode. It's probably something I have installed, then... now to figure out what...
  2. sifon48 macrumors newbie

    Jul 23, 2011
    I have the same problem with my late 2009 macbook....

    Still can not find solution for it
  3. Mightee macrumors member

    Feb 25, 2004
    Try resetting the SMU on startup. The SMU controls a lot of power management and is often the culprit when it comes to odd sleep/wake issues. (Look it up for your model on Apple Support, I think the method varies.)
  4. dradam macrumors newbie

    Jul 23, 2011
    2009 imac bluetooth devices frozen after sleep

    The issue I'm having ever since upgrading to Lion is that whenever I attempt to wake my iMac 24" 2009 from sleep using my bluetooth keyboard, trackpad, or mouse, it doesn't wake up. I have to push the power button to get it to wake up and even then, the bluetooth devices don't respond. I have to restart the iMac to get the devices to respond.

    Yes, the preference to "allow bluetooth devices to wake from sleep" is selected - no help there.

    I even tried to resync the keyboard, and here's the strange thing, even though the iMac recognizes the keyboard (it works after I restart the mac), when I ask the iMac to search for available bluetooth keyboards, *nothing shows up*! Weird!

    Any thoughts? It's painful not to be able to put the machine to sleep.

    Thanks for any help!

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