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Re: Debugging a sleepless Mac
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Re: Debugging a sleepless Mac


  • Subject: Re: Debugging a sleepless Mac
  • From: Matt Gough <email@hidden>
  • Date: Wed, 16 Mar 2011 16:35:41 +0000

On 16 Mar 2011, at 15:32, Kyle Sluder wrote:

> On Wed, Mar 16, 2011 at 5:37 AM, Matt Gough <email@hidden> wrote:
>> So it seems that something else is preventing idle sleep, but I've no idea how to find the culprit. Is there some defaults setting I can use that will log what the OS wants to do at sleep time and what is blocking it?
>
> According to the I/O Kit Power Management Release Notes, `pmset -g`
> should list all outstanding power management assertions.
> http://developer.apple.com/library/mac/#releasenotes/Darwin/RN-IOKitPowerManagment/_index.html
>
> I'd say try that and see if it tells you who's preventing system sleep.
>
> --Kyle Sluder


Thanks to everyone for the suggestions so far.

Alas, pmset -g it doesn't show any active assertions (I know it can do as I slapped one in my code and it showed up).

I have also tried turning off ttyskeepawake, but to no avail.

I didn't mention in my previous email that I have no problem with display sleep working correctly, its just idle sleep that is misbehaving.

Looking through the logs, I can't see any power related ones.

Apart from user interactions, what other sorts of activity automatically prevent idle sleep?

Matt_______________________________________________

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  • Follow-Ups:
    • Re: Debugging a sleepless Mac
      • From: Laurent Daudelin <email@hidden>
    • Re: Debugging a sleepless Mac
      • From: Dave Keck <email@hidden>
    • Re: Debugging a sleepless Mac
      • From: Kyle Sluder <email@hidden>
References: 
 >Debugging a sleepless Mac (From: Matt Gough <email@hidden>)
 >Re: Debugging a sleepless Mac (From: Kyle Sluder <email@hidden>)

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