Wake reason EC.Sleeptimer

[mikeorchard]

Hi guys,

For some reason my 2012 iMac with Fusion keeps waking up on it's own throughout the night, every 4 hours. In the Energy Saver settings, wake for network access and the schedule are both disabled and it's set to put the computer and display to sleep after 15 minutes of inactivity.

Output of syslog |grep -i "Wake reason":

Mar 29 19:30:32 michaels-imac kernel[0] <Debug>: Wake reason: EHC2
Mar 29 20:56:59 michaels-imac kernel[0] <Debug>: Wake reason: EC.SleepTimer (SleepTimer)
Mar 29 23:47:06 michaels-imac kernel[0] <Debug>: Wake reason: EC.SleepTimer (SleepTimer)
Mar 30 00:03:30 michaels-imac kernel[0] <Debug>: Wake reason: EC.SleepTimer (SleepTimer)
Mar 30 04:03:41 michaels-imac kernel[0] <Debug>: Wake reason: EC.SleepTimer (SleepTimer)
Mar 30 04:20:06 michaels-imac kernel[0] <Debug>: Wake reason: EC.SleepTimer (SleepTimer)
Mar 30 08:20:16 michaels-imac kernel[0] <Debug>: Wake reason: EC.SleepTimer (SleepTimer)
Mar 30 08:36:40 michaels-imac kernel[0] <Debug>: Wake reason: EC.SleepTimer (SleepTimer)
Mar 30 11:22:26 michaels-imac kernel[0] <Debug>: Wake reason: XHC1

Output of pmset -g:

Active Profiles:
AC Power -1*
Currently in use:
standby 1
powerbutton 1
womp 0
halfdim 1
hibernatefile /var/vm/sleepimage
autorestart 0
networkoversleep 0
disksleep 10
sleep 15
autopoweroffdelay 14400
hibernatemode 0
autopoweroff 1
ttyskeepawake 1
displaysleep 15
standbydelay 4200

I assume that if I set both autopoweroffdelay and autopoweroff to 0 this will fix the problem? As the delay setting of 14400 seconds is equal to the 4 hours shown?

It wouldn't really bother me but the iMac is in my bedroom, so throughout the night it's lighting the room up and waking me up.