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iMac with Lion not waking after overnight sleep

Since upgrading to Lion a few days ago, my iMac (2010) won't wake up with magic keypad swipe, button press, spacebar or any other key. Works fine and wakes fine when used periodically during the day, but is locked tight upon first use in the AM. The only thing that works is a hard power off and reboot. Any thoughts? Thanks!

iMac, Mac OS X (10.7)

Posted on Jul 22, 2011 11:49 AM

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265 replies

Aug 7, 2011 9:42 AM in response to alanfromcamas

Add me to this list!! I am anew IMac user ( 5 months) and this just started hepping a few days ago! I also upgraded to Lion, but the wake up from sleep mode/BT problems have onlu just surfaced, which is wierd!!

My som has a Mac laptop and has no idea whats going on. Deffo a Lion "bug" me thinks!!

Hopefully it will be addressed soon as it is a Royal pain in the arse having to hold the power button down just to get the IMac back up again!!

Thanks for letting me vent........

Aug 11, 2011 9:33 AM in response to alanfromcamas

Same problem here - iMac 24" early 2009.

Sleep kills bluetooth and wifi

Even plugging in a USB keyboard to restart OSX 10.7 does not work since OSX is to badly coded that the system cannot restart on its own - just freezes with the wait-dial running forever. Hard power off is the only way to get the sick lion restarted.


**** I regret paying to have my iMac ruined by Apple.

In my capacity as IT admin. I have stopped all migration to OSX 10.7 at my workplace until Apple gets their decency back and fix this basic problem. At least my trouble saved all the other users at work from this annoyance.


Have tried resetting SMC, repair disk, repair rights - no result.

The problem persists and does not have to be over-night - 8 hours during a workday is enough to kill the sick Lion.

Aug 11, 2011 11:11 AM in response to PerChristensen

Hi


I posted a page or so back.


Still exactly the same here as PerChristensen above..


My Macbook which also runs Lion - is fine - it doesn't have any bluetooth keyboards or mouse however.


Meanwhile, my 2010 iMac which has ran perfectly for over a year, suddenly is not able to be left on for more than a few hours - in case it should go to sleep.


USB mouse is a workaround - it does not turn off properly and still needs the plug pulled.


I am a developer and I cannot put up with this problem for reasons listed above.


The last time it did it (twice yesterday), I used my mouse and noticed that wifi had gone down as well..


I once had a PC that did things like this after sleep mode - I always put it down to the sleep management code in the BIOS but then again Macs are a little different there..


It does seem to be directly related to Sleep mode - Apple what did you change in the low level code there between Snow Leopard and Lion?


Yesterday, I also got my first kernel panic ever on this machine - a slowly filling up screen from the top to the bottom followed by a message that I had to restart my machine.

I was running latest Parallels 6 and handbrake and Xcode at the time but I digress as this is not the thread for discussing that.. Just an observation that Lion is causing problems...

Aug 11, 2011 3:26 PM in response to Techworld Services

Sounds like the same problem I was having. I did the stuff that Stellamaris5 recommended several days ago and the problem has not happened again. Apparently it does not work for everyone, but might be worth trying. Hope it helps:


Shut Down

Start while holding down the Option key

Choose the Recovery disk

Choose Disk Utility

Choose your volume (usually Macintosh HD)

Repair disk

Then repair permissions

Reboot

Aug 14, 2011 5:32 AM in response to alanfromcamas

Robocopnz, Mine is still acting up and i just realised after eading your post that it was about a week or so later the Lion upgrade my IMac started doing this. I then realised that I installed approx 7 updates from Apple on July 27th, up until then my IMac was waking up OK!! I am now thinking it may not be Lion itself, but one of the updates that were installed??

I think the updates included imovie, idvd,garageband, utilities plus a few more.

It was fine for the first week or so, but i am new to Macs so I am unsure what to look for.

Bloody annoying problem and probably not doiny my IMac any good either!!

Aug 14, 2011 5:41 AM in response to simonb1964

😁 OK... i will tell you that Lion is the only problem you have to worry about at this time, not your updates, I have a Mac Pro which is doing the same thing after installing Lion, Lion is good but there is a bug that needs to be addressed, So feel comfortable in the Knowledge that we all seem to have the same problem,and on different computers i might add 🙂.

Aug 15, 2011 2:13 PM in response to alanfromcamas

I tried this yesterday afternoon.

Although when I held down the Option key nothing happened. Anyway, i went into disk utilities and checked for permission erros (which it found loads of) and then repaired them. Since then, my IMac has been waking up fine!!

Not sure (new Mac user) what all those permission repairs were all about, and i haven't tried to do alot of things since but so fa so good, it awoke using a mouse click after sleeping the past 12 hours or more!!

iMac with Lion not waking after overnight sleep

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