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User profile for user: Goozak
Goozak Author
User level: Level 1
13 points

Closed lid Mac keeps getting woken up by EHC2

Hello community !


My MacBook Pro (15-inch 2.4/2.2GHz) started this several months ago : I close the lid to put it to sleep, but it randomly wakes up - sometimes several times an hour. The Apple logo lights up, the drive makes the 'wake up' sound, and just like that, it goes back to sleep.


I found the Terminal command syslog |grep -i "Wake reason", which lists all the times the Mac wakes up, along with the reason. I know that LID0 is the cover and UHC3 is the keyboard, but the mysterious ones are from EHC2 (with or without FRWR). Just last night, between 1:15 and 3:30, it woke up 29 times!


From what I read, this should be a USB (or Firewire) drive, but I don't have any attached... The Mac is connected via WiFi to an Airport Extreme (WITHOUT a USB drive), and is setup to NOT "Wake for Ethernet network access" (I don't have an Ethernet connection anyway). I recently deactivated Bluetooth connection, with no effect.


Could the fact that the Mac is always connected to the power adapter be the source of the problem? I just thought about this - will try to unplug it when putting the Mac to sleep..


Any ideas what might be the cause of this annoyance?

Thanks 🙂

MacBook Pro, Mac OS X (10.6.8)

Posted on Apr 21, 2012 2:06 AM

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User profile for user: X423424X
X423424X
User level: Level 6
14,265 points

Posted on Apr 21, 2012 2:36 AM

Just use PleaseSleep to solve these problems. That's how I solved my wake-from-sleep problem. I think mine was from USB too, in my case a non-apple keyboard with usb ports. But I was never sure and I wasn't going to give up my keyboard. PleaseSleep attempts to force the system to obey the energy saver settings.


I am curious though about something. With the power adaper in, open Terminal (in Utilities) and type the following:


pmset -g


what does the line that says "sleep" say?

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User profile for user: X423424X
X423424X
User level: Level 6
14,265 points

Apr 21, 2012 2:36 AM in response to Goozak

Just use PleaseSleep to solve these problems. That's how I solved my wake-from-sleep problem. I think mine was from USB too, in my case a non-apple keyboard with usb ports. But I was never sure and I wasn't going to give up my keyboard. PleaseSleep attempts to force the system to obey the energy saver settings.


I am curious though about something. With the power adaper in, open Terminal (in Utilities) and type the following:


pmset -g


what does the line that says "sleep" say?

Reply

Closed lid Mac keeps getting woken up by EHC2

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