James Brust

Q: System keeps waking from sleep every 2 hours

Since Yosemite update, system keeps waking from sleep approx. every 2 hours. It goes back to sleep on its own but keeps waking up again. I have "wake for network access" in System Preferences turned off. Here are samples of the console messages:

 

10/19/14 1:02:43.000 AM kernel[0]: Wake reason: RTC (Alarm)

10/19/14 1:02:43.000 AM kernel[0]: RTC: Maintenance 2014/10/19 08:02:43, sleep 2014/10/19 06:14:45

10/19/14 3:00:41.000 AM kernel[0]: Wake reason: RTC (Alarm)

10/19/14 3:00:41.000 AM kernel[0]: RTC: Maintenance 2014/10/19 10:00:41, sleep 2014/10/19 08:12:51

 

I have no idea what "Wake reason: RTC (Alarm)" means. Any help would be appreciated.

iMac, OS X Yosemite (10.10), 2011 iMac Intel Core i5 12GB RAM

Posted on Oct 19, 2014 5:20 PM

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Q: System keeps waking from sleep every 2 hours

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  • by GaryKing,

    GaryKing GaryKing Oct 20, 2014 9:09 AM in response to James Brust
    Level 1 (10 points)
    Oct 20, 2014 9:09 AM in response to James Brust

    I've got the exact same problem as you. My Mac wakes from sleep every two hours since upgrading to Yosemite. And I've got the same reason given in Console.

  • by vegeta777,

    vegeta777 vegeta777 Oct 20, 2014 6:24 PM in response to GaryKing
    Level 1 (0 points)
    Oct 20, 2014 6:24 PM in response to GaryKing

    Same/similar issue.

     

    Oct 20 16:29:39  kernel[0] <Notice>: Wake reason: RTC (Alarm)

    Oct 20 16:29:39  kernel[0] <Notice>: AppleCamIn::systemWakeCall - messageType = 0xE0000340

    Oct 20 16:29:39  kernel[0] <Notice>: AppleThunderboltNHIType2::prePCIWake - power up complete - took 1 us

    Oct 20 16:29:43  kernel[0] <Notice>: AppleThunderboltGenericHAL::earlyWake - complete - took 4358 milliseconds

    Oct 20 16:29:44  kernel[0] <Notice>: AppleCamIn::handleWakeEvent_gated

    Oct 20 16:30:04  kernel[0] <Notice>: ARPT: 3331.330078: AirPort_Brcm43xx::powerChange: System Wake - Full Wake/ Dark Wake / Maintenance wake

    Oct 20 16:30:04  kernel[0] <Notice>: AppleCamIn::systemWakeCall - messageType = 0xE0000340

    Oct 20 16:30:08  kernel[0] <Notice>: AppleCamIn::handleWakeEvent_gated

    Oct 20 16:30:51  kernel[0] <Notice>: AppleCamIn::systemWakeCall - messageType = 0xE0000340

    Oct 20 16:30:51  kernel[0] <Notice>: AppleBCM5701Ethernet [en3]:        0        0 memWrInd fBJP_Wakeup_Timer

    Oct 20 16:30:53  kernel[0] <Notice>: AppleCamIn::systemWakeCall - messageType = 0xE0000340

     

    wake.tiff

  • by mediahound,

    mediahound mediahound Oct 21, 2014 10:11 PM in response to James Brust
    Level 1 (19 points)
    Mac App Store
    Oct 21, 2014 10:11 PM in response to James Brust

    Same here. MacPro early 2008.

     

    This only started after upgrading to Yosemite.

     

    Apple, please fix!

  • by rpaloalto,

    rpaloalto rpaloalto Oct 22, 2014 9:34 AM in response to James Brust
    Level 1 (25 points)
    Oct 22, 2014 9:34 AM in response to James Brust

    Yes I get the same thing on my 2008 mac pro. It wakes from sleep about every 2 hours. It does some thinking, then goes back to sleep. Probably not a issue with a macbook or imac. But these older mac pro's make a **** of a racket firing up all 5+ fans at 3am:(

     

    I did a fresh install on a new hdd. No other software installed. All sharing options, including wake for ethernet is turned off.

    I'll bee booting of the mavericks drive for a few more months until Apple solves this.

     

    Googling this issue, gets plenty of results. It's pretty widespread. I'm surprised Apple did not catch this one during testing.

  • by seduc,

    seduc seduc Oct 22, 2014 9:40 AM in response to James Brust
    Level 3 (510 points)
    Oct 22, 2014 9:40 AM in response to James Brust

    see:

    System Preferences > Energy Saver > Enable Power Nap

  • by mediahound,

    mediahound mediahound Oct 22, 2014 11:02 AM in response to seduc
    Level 1 (19 points)
    Mac App Store
    Oct 22, 2014 11:02 AM in response to seduc

    My model MacPro doesn't support Power Nap so that doesn't even show in Energy Saver.

  • by GaryKing,

    GaryKing GaryKing Oct 22, 2014 11:04 AM in response to mediahound
    Level 1 (10 points)
    Oct 22, 2014 11:04 AM in response to mediahound

    Power Nap is not the problem anyway. I have it off on my Mini, as do a lot of other people. It's almost definitely a bug, based on the multiple threads about it. It's specific to Yosemite. I'm just hoping it gets fixed soon.

     

    There are some quick fixes for it that require changes in the Terminal, or plist files, but I'm weary of doing those. I'm willing to wait for an official fix; hopefully one arrives within a week or two.

  • by Matthew Wilson5,

    Matthew Wilson5 Matthew Wilson5 Oct 22, 2014 11:18 AM in response to GaryKing
    Level 1 (35 points)
    Oct 22, 2014 11:18 AM in response to GaryKing

    Same here on an 2009 Mac Pro even with everything switched off in energy saver and no applications running.

     

    Others have even tried clean installs to solve it but it persists so it seems to be an OS X bug unless this is now considered normal behaviour.

     

    It is related to the new discoveryd process as it is possible to stop it by editing a plist (see here http://ispire.me/fix-yosemite-rtc-alarm-wakeup-issue/) however this causes other problems so we have to hope an official fix comes  soon....

  • by mediahound,

    mediahound mediahound Oct 22, 2014 11:27 AM in response to Matthew Wilson5
    Level 1 (19 points)
    Mac App Store
    Oct 22, 2014 11:27 AM in response to Matthew Wilson5

    I hope Apple is listening and comes out with a fix for this quickly in the form of a Yosemite 10.10.1 update or something.

  • by James Brust,

    James Brust James Brust Oct 22, 2014 11:48 AM in response to James Brust
    Level 1 (68 points)
    Oct 22, 2014 11:48 AM in response to James Brust

    As GaryKing said, there are some stated fixes out there that require Terminal commands.I found this one on several sites and copied (I now can't find the original sites to give a link unfortunately). A number of people said it worked perfectly. But I haven't done it  because I too am leery of using  commands where I don't understand exactly what they are doing. If anyone wants to try this & report back that would be great. Here's the supposed fix which disables discoveryd and enables mDNSResponder (I don't pretend to understand those are!)

     

     

    Disable discoveryd:

     

    sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.discoveryd.plist

     

    Enable mDNSResponder:

     

    sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.mDNSResponder.plist

  • by seduc,

    seduc seduc Oct 22, 2014 1:40 PM in response to mediahound
    Level 3 (510 points)
    Oct 22, 2014 1:40 PM in response to mediahound

    Wake for network access is off too?

  • by seduc,

    seduc seduc Oct 22, 2014 2:03 PM in response to James Brust
    Level 3 (510 points)
    Oct 22, 2014 2:03 PM in response to James Brust
  • by mediahound,

    mediahound mediahound Oct 22, 2014 2:10 PM in response to seduc
    Level 1 (19 points)
    Mac App Store
    Oct 22, 2014 2:10 PM in response to seduc

    As mentioned above 'Wake for network access' is unchecked for me and other experiencing the issue.

  • by seduc,

    seduc seduc Oct 22, 2014 2:14 PM in response to mediahound
    Level 3 (510 points)
    Oct 22, 2014 2:14 PM in response to mediahound

    You coul'd test if it's an internal problem or one with the network by turning off your router.

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