How to find what's breaking my powermgmt plist

Question

Chipstix Author

Level 1

4 points

How to find what's breaking my powermgmt plist

My display won't sleep.

If I delete powermgmt.plist, then log off and back on again - it sleeps.

How do I find what is either:

a) messing up my plist file so that the above procedure needs to be done to fix it

OR

b) staying 'active' somehow and preventing the display from sleeping.

Can I use activity monitor to help me? If so, what am I looking for?

I like to have sleep display set for 1min, then not worry about a screensaver.

Thanks,

Chipstix

iMac 20, Mac OS X (10.6.7), 2.16GHz Duo, 500GB HDD

Posted on Jul 29, 2011 11:02 AM

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Answer 1

X423424X

Level 6

14,265 points

Jul 29, 2011 11:41 AM in response to Chipstix

Look at your kernel log for a line that says "Wake reason" and look here for the reason codes. Maybe that will shed some light on your problem.

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Answer 2

Chipstix Author

Level 1

4 points

Jul 29, 2011 3:48 PM in response to X423424X

Interesting tip, thanks.

I got 6 "USB7" and a "RTC"

Can't immediately see how they prevent display sleep, though need to look more into RTC. (Guess the USB7 is docking the iPhone)

"

RTC: Real Time Clock Alarm, is generally from wake-on-demand services like when youschedule sleep and wake on a Mac via the Energy Saver control panel. It can also be from launchd setting, user applications, backups, and other scheduled events."

on Jul 25 19:50:22 chrissuzies-computer-2 kernel[0] <Debug>: Wake reason = USB7

Tue Jul 26 22:19:53 chrissuzies-computer-2 kernel[0] <Debug>: Wake reason = USB7

Wed Jul 27 17:40:31 chrissuzies-computer-2 kernel[0] <Debug>: Wake reason = USB7

Thu Jul 28 23:44:10 chrissuzies-computer-2 kernel[0] <Debug>: Wake reason = USB7

Fri Jul 29 22:13:01 chrissuzies-computer-2 kernel[0] <Debug>: Wake reason = RTC

Fri Jul 29 22:37:31 chrissuzies-computer-2 kernel[0] <Debug>: Wake reason = USB7

Fri Jul 29 23:44:21 chrissuzies-computer-2 kernel[0] <Debug>: Wake reason = USB7

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Answer 3

Chipstix Author

Level 1

4 points

Aug 9, 2011 3:26 AM in response to Chipstix

Still not tracked down what's causing unreliability with the display sleep.

I love my Mac, but this bug is really getting on my nerves.

C.

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