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For some reason, my Mac keeps shutting down instead of going to sleep. I've checked all the settings and nothing I can find is set to shut down. Any idea what is going on? Possibly related... my Dashboard stuff keeps disappearing (see post in Finder,Dock discussions) Hope someone can help!
I have a similar problem. The screensaver kicks in, but I'll come back to find the computer has logged out by itself. The login window will be up at full screen brightness (the machine appears not to sleep after this "crash" happens). It's both annoying and a waste of energy.
I find nothing unusual in the logs, or at least nothing consistently unusual. I do have a new external hard drive I'm using with Time Machine, which is where I lay my suspicions since I'm also having trouble with the drive not staying asleep. It'll go to sleep if I sleep the computer manually, but then will wake up even though the computer is still sleeping.
I'm really tired of the recurring sleep/wake issues that arrive with every new OS X upgrade.
i have the same problem happening with my mac. i have had leopard installed since release and had zero problems until this week. i come back to my mac and it has logged off and shutdown all by itself from sleep. i have not changed any settings and have looked around my energy saver settings but everything looks to be o.k. cant figure this one out..... although i think it might have to do with an update that i installed last week... quicktime?
it is an imac.... i seriously think it happened with an update but can not confirm this.... i read other posts that quicktime was causing havoc with sleep modes so i think im going to uninstall and get a lower version somewhere... to bad im not using time machine but i do not feel like loading my external with redundancy...
This has been happening to our 3yo iMac for over two months now. It spent a week at the "doctor" and of course they weren't able to recreate the problem.
No matter what we do - what preferences we change in System Preferences, peripherals we turn off or unplug from the back (my husband read there was an HP printer issue), it shuts down upon sleeping (regardless of how we do it - with the power button or file menu).
o.k. i ran a apple hardware test (2.2.1 disk came with my imac) on my imac i suspected a bad logic board or faulty ram for the shut downs. everything passed so now i am back to thinking that it was due to an update.... any ideas?
just to be safe i ran another diagnostic this time using tech tools version 4. from what i understand its not exactly geared for 10.5 but for 10.4. i ran it anyway just to see what happened... everything passed. so now im more convinced that it is a software issue with my mac not sleeping properly. so time will tell if the new update to 10.5 come january will fix my bug.
Any time you have problems with power management or sleep/wake or shutdown/boot there are a few basic steps to try. These apply both to Tiger (10.4.x) and Leopard (10.5.x) versions of the Mac OS.
First, reset the low level controller in your computer that handles power management and sleep/wake functions (including scheduled events). In an intel-based Mac that is the SMC. In a powePC-based Mac that is the PMU. To do this, go to the main Support page here and search for "reset SMC" or "reset PMU" as is appropriate in the search field at the top LEFT of that page. In the list of Knowledge Base articles returned, find the instructions specific to your model of Mac. It is not tough to do, but you do have to find the instructions for your specific Mac. Note that resetting a PMU may require you to manually adjust the date and time (System Preferences / Date & Time) the next time you log in.
Next, reset the Parameter memory (PRAM). PRAM holds copies of various system settings for rapid access and if it gets out of whack all sorts of odd things can happen. The instructions for resetting PRAM are the same for all Macs. Shut Down the computer. Locate the 4 keys Apple-Option-P-R. Press and hold those 4 keys, and while doing so, press and release the power button. Keep those 4 keys held down until you hear the SECOND startup chime, then release them. Your computer will continue to boot up normally.
Finally, perform a Safe Mode boot. A Safe Mode boot does some maintenance tasks in the background such as repairing critical system file permissions and deleting some cache files, etc. To do a Safe Mode boot, hold the "shift" key while booting until you see the spinning gear on the gray Apple screen. Be patient, this will take a while. Eventually you will get to a log in window that includes a notation that you are booted in Safe Mode. No need to log in as the maintenance stuff has already happened. So just Shut Down from there and reboot normally.
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If your Sleep problem persists after these three steps, take a look in the Console to see if any helpful error messages are being thrown (Applications / Utilities / Console -- select "All Messages" in the column on the left). Now even during a NORMAL boot and log in, there are a lot of Console messages generated, some of which can look pretty scary if you are not used to them. But a normal Sleep or Shut Down should generate very few messages, so scroll back in the list to the time where you tried to put the computer to Sleep and see what you find.
--Bob
so once again i have checked my hardware and everything seems to have passed. i have reset my pram and pmu and logged into safemode. based on the logs my "volume appears to be ok". when i am asking the computer to sleep the console recorded this...
12/29/07 4:39:08 PM com.apple.loginwindow[25] Shutdown NOW!
12/29/07 4:39:08 PM com.apple.loginwindow[25] System shutdown time has arrived
so instead of sleeping the computer is being told to shutdown...... other than that everything looked to be ok. nothing else seems to have failed upon shutdown or startup. any ideas what to look for?
There is apparently some preference setting which is converting your Sleep command into a Shut Down command -- as if your computer is not capable of being put to Sleep. I'm sorry but this is beyond my experience.
--Bob
thanks for the input. i appreciate what you have done. but this still leads me to the conclusion that an update to my system changed the sleep mode somehow. now is to try to reverse what happened.
Have you adjusted your Power Management preferences? You might want to try "reset to default" in your Power Management preferences menu. If it doesn't solve the problem, then you can at least know it's something wrong with the system and not with something you did or some adjustment an application made.
