IMac with waking up randomly from sleep mode

Hello everybody!
Since I installed Snow Leopard (all updates done) my iMac is randomly waking up from sleep mode without any reason that I know of. Some days everything is fine, next day it wakes up when I am at work and retrieves mails (thats how I see it is awake).
Also I set it up to shut down after 1h idle time- this does not work as well.
Any ideas how to track the problem?

re:
Just happened again.
My activity monitor:
123 AirPort Base Station Agent 0,0 3 856 kB
2974 Aktivitetsmonitor 8,6 6 20,2 MB
293 AppleSpell.service 0,0 2 5,8 MB
105 Dock 0,0 3 10,0 MB
107 Finder 0,0 6 35,8 MB
109 fontd 0,0 3 5,0 MB
129 GeekTool 0,9 4 3,6 MB
188 GrowlHelperApp 0,0 3 10,3 MB
127 iTunesHelper 0,0 3 1,5 MB
99 launchd 0,0 2 836 kB
29 loginwindow 16,5 2 7,5 MB
152 Mail 0,0 7 60,3 MB
2977 mdworker bjarne 0,0 3 3,2 MB
110 pboard 0,0 1 488 kB
128 Quicksilver 0,0 3 19,6 MB
154 Safari 0,0 9 207,1 MB
2985 snmpInk 0,0 3 1,8 MB
106 SystemUIServer 0,3 4 19,8 MB
117 UserEventAgent 0,0 3 3,3 MB
239 WebKitPluginAgent 0,0 2 696 kB

Similar Messages

  • Imac waking itself up from sleep mode

    i am very concerned about my imac it keeps waking itself up from sleep mode. i checked the prefrences and its not scheduled to wake itself up, do i have a virus?

    OK jon,
    We stil don't know exactly which iMac CRT you have but this is based on the 350 - 400 Slot loader and is from the service manual:
    "Resetting the PMU on the Logic Board
    Resetting the PMU (Power Management Unit) on the logic board
    can resolve many system problems. Whenever you have a unit that
    fails to power up, you should follow this procedure before
    replacing any modules.
    1. Disconnect the power cord and check the battery in the battery
    holder (BT1). The battery should read 3.3 to 3.7 volts.
    If the battery is bad, replace the battery, wait ten seconds,
    and then reset the PMU (refer to the next step). If the battery
    is good, go to the next step.
    2. Press the PMU reset switch (S1) once on the logic board and
    then proceed to step 3. Do NOT press the PMU reset switch a
    second time because it could crash the PMU chip.
    3. WAIT ten seconds before connecting the power cord and powering
    the computer on. If the computer powers on, go to the
    next step. If the computer does not power on, there is something
    else wrong with the computer, refer to the symptom/
    cure chart, “No Power” in this chapter."
    Richard

  • I upgraded to Mountain Lion.Now I have trouble waking it up from sleep mode. Why?

    I upgraded to Mountain Lion on my MacBook. I am now having trouble waking it up from sleep mode. Does anyone know why or how to wake it up. I try tapping the space bar, trackpad & other keys. Sometimes I think it's never going to wake up.

    I'm not certain but my new MBA 13...when in sleep mode comes back on from a black screen when I simply click on the left mouse button. Also, one time I did a SECURE EMPTY TRASH on files that totalled more than 1GB and it took so long that the fan kept increasing in speed so I pressed on the POWER button and the MBA shut...I was able to boot up with no problem. As a rule, I now only do secured erases for trash bin data totalling 500mb or less...anything above that gets a regular erase (dump).

  • IMac freezes up after awaking from sleep mode. I then Force it to shut down

    My iMac freezes up after awaking from sleep mode. I then Force it to shut down and it freezes up during startup. Any clues out there? This is a first generation iMac G5 17".

    Welcome to Discussions - check and see if you're included in Apple's Repair extension programs, your power supply or capacitors might be bad.

  • My imac has a gray screen when waking it up from sleep mode. about 9 months ago, I installed OS X Maverick.

    This is the second time this has happened, since installing OS X (9 mos. ago). (I can't recall the fix from the last incident.) Upon waking the pc up from sleep mode, I get a gray screen. Nothing works except using the Command and P & R keys to get to "reinstalling OS X", to no avail. What do I need to do to get it back to normal?
    My imac is a 21.5", mid 2011 item.

    Those keys do not reinstall OS X. To do that:
    Reinstall Lion, Mountain Lion, or Mavericks without erasing drive
    Boot to the Recovery HD:
    Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
    Repair
    When the recovery menu appears select Disk Utility. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list.  In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive.  If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported then click on the Repair Permissions button. When the process is completed, then quit DU and return to the main menu.
    Reinstall Mountain Lion or Mavericks
    OS X Mavericks- Reinstall OS X
    OS X Mountain Lion- Reinstall OS X
    OS X Lion- Reinstall Mac OS X
         Note: You will need an active Internet connection. I suggest using Ethernet
                     if possible because it is three times faster than wireless.
    COMMAND-OPTION-P-R keys resets the PRAM. OS X keyboard shortcuts.

  • IMac occasionally fails to wake from sleep mode

    This is a transient problem. Happens every 2-3 days that computer fails to wake up from sleep mode. Space bar doesn't do anything and I finally have to unplug it and reboot. I have a late 2008 iMac and am running Lion. It has started doing this after I installed Lion but doesn't seem to be related.

    It's tough to troubleshoot intermittent problems. You can try by restarting in Safe Mode, this will clear some caches. It's possible one or more is corrupt.

  • Not detecting external display after waking up MBP from sleep mode

    I am a recent owner of a MBP and enjoying it. However, one problem that I can't seem to find a solution to is the external display problem after sleep mode.
    When I first boot up the Mac and plug in my Dell external monitor via the mini adapter, there is no problem with detection or display. However, every time I put the MBP in sleep mode and then wake it up again, the external monitor does not "wake" up and my MBP only displays my normal screen on the Mac.
    I tried to 'Detect Displays' to no avail and the only solution is unplugging the mini connection and plugging it back into the MBP for the MBP to re-detect the external monitor.
    Although this is a quick fix in itself, I do not want to wear out the mini port by doing this every timeI come out of sleep mode. Any solutions so that the external monitor will detect the MBP waking up from sleep and display properly? Thanks!

    And same problem here.
    Using a MBP 2.66 i7 with a Dell 3008WFP that's connected to the MBP through DisplayPort. It works some of the time but once in a while (only been using the new MBP for a couple of days now) the monitor won't come out of sleep mode. Turning it off/on causes OS X to completely ignore the monitor. I was able to get this setup to work again by pressing 'Detect Displays' in the System Preferences pane but most of the times that doesn't help. The only sure way to get the monitor working again is by booting into Windows through Bootcamp, Windows is able to use the monitor, if I reboot after that OS X sees the monitor again.
    Also saw a magenta line/stripe on the left side of my monitor and the monitor sometimes makes a buzzing sound when connected to the MBP through DisplayPort. That's what you get by using bleeding edge tech I guess :\ Only alternative is buying the mini-DP to dual-DVI connector but paying $99 just to be able to use an external monitor is rather insane. Besides that lots of users are having problems with this adapter.

  • How do I start up my computer when the screen is black after "waking" it up from sleep mode and/or turning it on from the shut down?

    I really need help! I just got this MacBook Air almost two weeks ago. It is a refirbished one. Now lately, when I put it to sleep and then get back to it, it won't wake up. It just gives me a black screen and a running noise. Sometimes it does it too when I shut it down. And sometimes it will work fine as if it never happens-i move the mouse and the computer starts up. I am deaf and living on campus for school, so there is no chance for me to get some help through a simple phone call and there is no nearby apple stores or providers.
    Please help me, I do not want to go back to my Dell computer.
    Ronni.

    I'm not certain but my new MBA 13...when in sleep mode comes back on from a black screen when I simply click on the left mouse button. Also, one time I did a SECURE EMPTY TRASH on files that totalled more than 1GB and it took so long that the fan kept increasing in speed so I pressed on the POWER button and the MBA shut...I was able to boot up with no problem. As a rule, I now only do secured erases for trash bin data totalling 500mb or less...anything above that gets a regular erase (dump).

  • USB doesn't wake up after waking MacBook Pro from Sleep Mode

    I have a problem with my new MacBook Pro.
    I attach an Apple 20" cinema display to the macbook pro USB connector and then I attach my apple keyboard and mouse to my cinema display.
    When I wake up my macbook from being asleep my mouse and keyboard are not activated. I have to unplug my cinema display USB connector and unplug my keyboard from the display and then plug them all back in again to get them to re-activate.
    Anybody know why this is occurring, its very frustrating each time my machine goes to sleep

    In that case, does the problem still exist when starting up the MBP in Safe mode and then putting it to sleep and awakening it?
    http://support.apple.com/kb/HT1455

  • Bizarre app behavior after waking from Sleep Mode

    My iMac Core Duo runs like a top. It is fast and quiet. I have no problems with applications, both Universal and PowerPC. I maintain it with everything that I suggest others do in posts.
    But, there is this one strange quirkiness that I have put off mentioning because I kept hoping that each new OS X update would address the issue. It has to do with waking my Mac from sleep mode with it logged into my user account. Not every time, but most of the time, if I put my Mac to sleep or it goes to sleep from inactivity while it is logged into my user account, I experience strange application behaviors upon waking.
    For example, upon awaking Mail.app will contact my .Mac account and download any new mail that has arrived. But, if I try to open any of this mail, instead of opening, Mail.app will open a new outgoing email addressed to whomever sent me the mail I tried to open. Quitting and restarting does not solve this problem. Other apps demonstrate similar bizarre behavior. To only way to solve the issue is to log out and back into my user account.
    However, if I log out of my user account and then put the Mac to sleep from the Login Manager I don't experience this issue. So at night I always log out before putting the Mac to sleep.
    Anyone else experiencing similar issues? Any ideas on solving this? Do you think it is a bug in Universal Mac OS X?

    Sorry this isn't a solution, rather is a commiseration. Often after my iMac wakes from sleep mode it refuses to see my internet connection. I have to unplug and reset my DSL modem to force the computer to see that it exists.
    It sounds like the problem might be related, does anyone have any brilliant suggestions?
    Thanks,
    Lonnie

  • Everytime I wake up my computer from Sleep Mode the sound starts to crackle on my X-Fi?

    Sometimes I'll be playing a song and a few seconds in it starts to crackle and distort the music. I notice that it only happens after my computer wakes up from sleep mode. Usually restart can fix the problem.
    I have an original X-

    Okay, I seem to have solved the problem I posted about earlier.  I noticed that the language preference in the upper right hand corner of the screen (between the date and time and the Spotlight icon) had somehow gotten switched from American English to French.  When I switched it back to American English, my password worked when waking the computer from sleep mode.  I have no idea why changing the language preference would affect the way the password works but that seems to have been the case.  I'll post again if I experience more problems.

  • My password works fine when I turn the computer on, but when I try to wake it from sleep mode the computer doesn't recognize my password -- the same one I used successfully when I turned the computer on.

    My password works fine when I turn the computer on, but when I try to wake it from sleep mode the computer doesn't recognize my password -- the same one I used successfully when I turned the computer on.

    Okay, I seem to have solved the problem I posted about earlier.  I noticed that the language preference in the upper right hand corner of the screen (between the date and time and the Spotlight icon) had somehow gotten switched from American English to French.  When I switched it back to American English, my password worked when waking the computer from sleep mode.  I have no idea why changing the language preference would affect the way the password works but that seems to have been the case.  I'll post again if I experience more problems.

  • Since updating to Lion the iMac won't recognise the external hard drive (maxtor) when waking from sleep mode,

    Hi All, Since updating to Lion, my imac won't recognise the ext HDD (Maxtor) when waking from sleep mode, I have tried another port, diisc utility (Ext HDD not listed in here) but nothing works. I now find that I have to restart the imac to get the drive recognised..which is fine until the imac goes into sleep mode then I lose the drive and have to restart etc etc.....anyone suffering same issue.  The Ext Drive worked perfectly until the upgrade..

    Thanks for this, and apologies for delay in replying...in between seeing your post I backed up the ext hdd to another mac and used the disc utility to erase and repair and then re mounted the ext hdd. OK.  I have then tested the ext hdd being recognised when waking from sleep mode a few times and everything appears to be fine. If this doesn't work (long term) I will follow the instructions as you have suggested....
    I now have a new problem with my HP printer (Photosmart Plus) which is not being recognised by a new wireless router..Ok whilst the router is switch on and I have reconfigured the printer..but when the router is switched off overnight and then switched back on...I get a 'printer is not connected' message and have to go through the re configure routine all over. I am minded to think this is a router problem as the same issue is happening to my wifes Mac Book Pro (which is only a few weeks old)...any suggestions..

  • Can't use mouse/keyboard/trackpad when waking iMac from sleep mode

    Basically as the title says. When I wake my iMac from sleep mode I am unable to use my keyboard/trackpad/mouse during the login window. Once the screen goes black by itself, after a minute or so I can then log in properly.
    Yes the keyboard/mouse/trackpad are all connected when it wakes from sleep as I can use any of them to wake it from sleep, I just can't move them or type with them in the login window.
    Processor  3.4 GHz Intel Core i7
    Memory  24 GB 1600 MHz DDR3
    Graphics  NVIDIA GeForce GTX 680MX 2048 MB
    Software  OS X 10.8.5 (12F37)

    Please read this whole message before doing anything.
    This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
    The purpose of the test is to determine whether the problem is caused by third-party software that loads automatically at startup or login, by a peripheral device, or by corruption of certain system caches. 
    Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode and log in to the account with the problem. Note: If FileVault is enabled on some models, or if a firmware password is set, or if the boot volume is a software RAID, you can’t do this. Ask for further instructions.
    Safe mode is much slower to boot and run than normal, and some things won’t work at all, including sound output and  Wi-Fi on certain models. The next normal boot may also be somewhat slow.
    The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin. Test while in safe mode. Same problem? After testing, reboot as usual (i.e., not in safe mode) and verify that you still have the problem. Post the results of the test.

  • IMac hangs waking up from sleep mode, what can I do?

    I have an iMac - early 2008, Inter Core 2 Duo, screenshots of full specs attached below.
    I upgraded to Mountain Lion about 3 weeks ago. No problem until 2-3 days ago when the iMac started to 'hang' after waking up from sleep mode.
    I'd try to launch Safari but the icon just bounces on the dock.
    Force quitting all open apps, force quitting Finder. Still nothing.
    Can't shut down unless I hold the power button down.
    Then on restart it says something about an application that was previously unresponsive...try to reopen it or wait 50 seconds (or thereabouts) - I choose the latter option.
    I've tried to do the usual verify/repair permissions and verify/repair disk. No problem found.
    Incidentally, this has only been happening since 'upgrading' to iTunes 11. Coincidence?
    Can someone help?

    Ok, I've done everything suggested above except for running the Disk Utility from the recovery partition, as I will have more time to spend on it tomorrow and that's something I'm too scared to try in a rush....!
    I've made a screenshot of the energy saving settings changed to your suggestion, could you let me know if that's what you meant?
    I really appreciate your help by the way

Maybe you are looking for