Lion won't go to sleep after idle timeout

Hello all. Just a quick question: I've just configured "computer sleep" timeout to 5 minutes in Energy Saver preferences but it looks like there is something wrong with it and my MBP is not going to sleep after timeout. On the other hand screen is correctly going to sleep. I've also tried login out and in and leaving system running without any app.
Any clue? Or is that just me missing something?
Thank you,
William

Ok I've been researching and dealing with this problem for a few weeks now.  I've read all the forums and tried all the recommended fixes.  I'll list all that I did in the order that I did them.  The sleep problem is fixed for me now.  There are a few things in here that I never saw suggested, especially the last one.  But first of all I have an Intel 27" iMac i7. Purchased new in Sept 2011.  Love the machine, best Mac I've ever owned.  I have 5 of them.  I loaded it from my 2006 Intel 24" iMac, using Migration Assistant while running snow leopard.  Soon after that I loaded Lion, sometime after that I started noticing the lack of sleep issues.  It started out that it wouldn't auto sleep, but I would just sleep the machine using the power button or the Apple menu.  About 3 weeks ago even those would not sleep the machine. Below is my process for hunting down this little bug.  Between each of these a reboot and sleep test was performed.
1.  Make sure everything is up to date.
2.  Loaded a piece of freeware called PleaseSleep, worked for a while but then stopped working when the hardware buttons wouldn't work.
3.  Unplugged all peripherals, turned off wifi
4.  Turned off all sharing preferences
5.  Plugged on an old USB mouse and turned off Bluetooth, including settings that allow Bluetooth to wake computer
6.  Reboot into Safe Mode
7.  Called apple support and performed a hard reset of the whole system, Shutdown Machine>Unplug From back of machine>Hold power button for 10 seconds>Plug back in>Startup.
8.  Created a Spare User account in order to test a blank or default set of user preferences.
9.  Downloaded the 10.7.3 Combo Updater and reinstalled the Lion updates.
10.  Switched into the Guest user account.  Tested sleep (Success!!!!!!!)  Rebooted back to normal  Tested Sleep (Success!!!!!!)
I'm not willing to say that just #10 was the one and only answer.  At this point I haven't turned on wake from Bluetooth yet.  It will auto sleep and sleep from menu or by pushing power button, but to wake I'm pushing the power button.  I do have all my Bluetooth peripherals back connected.
Hope that helps someone.

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    Use Carbon Copy Cloner to reverse clone the clone onto the internal, copies the Recovery HD too.
    That should fix it, or else the drive or another hardware issue
    ..Step by Step to fix your Mac
    Install/upgrade RAM or storage drive in Mac's

  • TS3824 My iMac won't wake from sleep after installing the most recent OS update.

    I'm having trouble with my iMac, the screen won't wake up after it goes to sleep. The one time it did the screen was all fuzzy and pink. This has only happened in the last few hours after installing the latest OS X Lion update. Is this normal? Can someone help?

    Hello, not normal.
    One way to test is to Safe Boot from the HD, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, Test for problem in Safe Mode...
    PS. Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive
    Reboot, test again.
    If it only does it in Regular Boot, then it could be some hardware problem like Video card, (Quartz is turned off in Safe Mode), or Airport, or 3rd party add-on, Check System Preferences>Accounts>Login Items window to see if it or something relevant is listed.
    Check the System Preferences>Other Row, for 3rd party Pref Panes.
    Also look in these if they exist, some are invisible...
    /private/var/run/StartupItems
    /Library/StartupItems
    /System/Library/StartupItems
    /System/Library/LaunchDaemons
    /Library/LaunchDaemons
    Bootup holding CMD+r, or the Option/alt key to boot from the Restore partitiion & use Disk Utility from there to Repair the Disk, then Permissions.
    Re-install if that doesn't work.

  • Won't go to sleep after last update

    My PowerMac G5 won't seem to go to sleep AUTOMATICALLY after the last update. I can manually put it to sleep but it won't go automatically, which means it runs all of the time. Any help?

    Answering my own question: I went to my Activity Monitor and found that I had a print file hung up and was using about 40% of CPU which kept it running and would not allow it to go to sleep. The reason for the print file being there was because I needed ink and it freaks the system when it cannot complete a print job because of low ink EVEN if you turn the printer off and quit out of EVERYTHING, it's still there, which I could find ONLY in the Activity Monitor status under the drop down list of "Active Processes" it showed the printing status that had been there for like 3 days. Then, just go to the red "quit process" click it and it finally frees up the CPU and goes to sleep when necessary. I hope this helps others who may have this "no sleep" problem.
    Aside: This had nothing to do with last update as I first suspected.

  • Mac book pro won't wake from sleep after Yosemite update

    Since updating my laptop to Yosemite my MacBook hasnt woken from sleep
    i can hear it turn on but the screen and keyboard don't light up
    mac book is only 3 years old retina display

    Mike Doolin wrote:
    I think I may have found the fix for this. My MacBook Pro was dying in its sleep every time (after installing Snow Leopard), whether it went to sleep automatically or I used a Hot Corner. I went into System Preferences>Desktop & Screen Saver and changed the screen saver to Flurry, and it works now. I had had it set to a folder containing a single .pct file that I had created.
    Good advice Mike! When in doubt check the ScreenSaver settings.
    Definitely seems that it has a problem with that pic... In my case, selecting any images instead of the default setting (no screensaver) seems to have cured my non waking issue on my early Macbook Pro in Snow Leopard.
    My original problem was that no amount of trackpad input woke it, but the space bar did. The space bar seemed to wake it up with the previous Screen Saver setting. Now trackpad wakes it up (even from total sleep as well as screen saver), too. Might be nice to know about if this is an intended 'feature' as a security trick. Otherwise I consider this a bug.
    My vote is that it's a bug.

  • MacBook Pro won't wake from sleep after installing Snow Leopard

    If my MacBook Pro is running while closed with an external display and I unplug it from the display it goes to sleep - as indicated by the white light and the front pulsing. If I then open the MacBook the display remains blank and it is completely unresponsive to any keys or track pad input.
    The only thing it responds to at that point is holding the power button down until it powers down and then restarting - loosing all work in progress at that point.
    Before installing Snow Leopard the Mac would wake reliably when opened from this state.

    Mike Doolin wrote:
    I think I may have found the fix for this. My MacBook Pro was dying in its sleep every time (after installing Snow Leopard), whether it went to sleep automatically or I used a Hot Corner. I went into System Preferences>Desktop & Screen Saver and changed the screen saver to Flurry, and it works now. I had had it set to a folder containing a single .pct file that I had created.
    Good advice Mike! When in doubt check the ScreenSaver settings.
    Definitely seems that it has a problem with that pic... In my case, selecting any images instead of the default setting (no screensaver) seems to have cured my non waking issue on my early Macbook Pro in Snow Leopard.
    My original problem was that no amount of trackpad input woke it, but the space bar did. The space bar seemed to wake it up with the previous Screen Saver setting. Now trackpad wakes it up (even from total sleep as well as screen saver), too. Might be nice to know about if this is an intended 'feature' as a security trick. Otherwise I consider this a bug.
    My vote is that it's a bug.

  • Mountain Lion won't wake from sleep

    I have an early 2011 MBP with 10.8 loaded. My laptop went to sleep and won't wake up. Are there shortcuts that may wake it or is the only thing to do is hold the power button?  Is there a fix to this? It isn't power nap as I have a HDD.

    Hi,
    Please perform an SMC reset.
    Shut down the computer.
    Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
    On the built-in keyboard, press the (left side) Shift-Control-Option(ALT) keys and the power button at the same time.
    Release all the keys and the power button at the same time.
    Press the power button to turn on the computer. 
    Note: The LED on the MagSafe power adapter may change states or temporarily turn off when you reset the SMC.
    Source: http://support.apple.com/kb/HT3964

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