sleep mode wake

Wakes up, and the screen disturbs the sleep of babies!

My beloved iMac 27 inches, mid-2011 has started this problem after the update from Apple. The computer wakes up and turns on the monitor (very bright) when the person has touched. This is a behavior much unwanted.

Inspection of syslog shows what is happening every 10 min. I tried unplugging all USB devices, nothing helps. I do not want to disable the 'siesta' mode, because this computer is used for the print server. Any help would be appreciated; If this continues, I will sell this device.

[fds@falcon ~] $ syslog | grep-i 'Reason Wake'

25 Dec 12:28:10 core Hawk [0] : Wake reason: EHC2

25 Dec 12:48:19 core Hawk [0] : Wake reason: EHC2

25 Dec 12:58:59 core Hawk [0] : Wake reason: EHC2

Best,

FDS

EHC2 can be any number of input, including Bluetooth devices, so if you use BT one or several of its devices may be defective or require an update of the firmware. Open system preferences > Bluetooth to determine devices associated with your iMac.

Does your system preferences > Energy Saver show Power Nap is an option to select? If your energy saver has an option for the NAP, something is wrong with your OS X installation because Power Nap is not supported on an iMac of mid-2011. All that would be necessary to enable it to function as a print server is to select 'network access' and select the share option is appropriate.

Tags: Mac OS & System Software

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