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Re: Cancel Sleep

On Jan 1, 2008, at 12:03 AM, Andrew James wrote:
Ok well the truth is im trying to create the over ride that will let you run the laptop in closed lid mode with out the extra hardware, it is a very needed feature. However i do plan on adding features to ensure the safety of the laptop (if temps get to high it will auto sleep etc)

I'm still not clear on why it's "very needed", but I'll take your word for it.

The software to fix this has been around for a long time (Insomnia.kext) but the current implementations used at the moment does not allow for some future features we wished to implement due to the message/notifications problems i mentioned earlier.

I remember Insomnia from KisMac, though that use case is one where I'd be very worried about thermal problems (walking around with a laptop running in a backpack or bag). Something like a battery powered Mini (like <http://www.pamurray.com/manga/macbat/>) might be a better approach (or using a PDA to gather data, and upload to the laptop later). However, I do agree that there are other use cases where running a laptop while closed would be useful.

PS. In a small survey i conducted the laptops in lid closed state did not show any major increases in temperatures over a duration of a few hours in normal operations (Not high CPU tasks)

In an office environment with reasonable airflow, I am not too surprised--I've run my MacBook Pro for hours with an external monitor attached and the lid closed, for example, without any apparent ill effect.

If I had to do this for a specific project, I'd probably end up building a custom kernel; it would surprise me if you could do everything you need to from a kext. You could always have your kext interpose itself by patching the running kernel, but this is (a) pretty risky, and (b) ties you to particular versions of the OS. If you're tied to particular OS revisions, you might as well just build a new kernel.

And if we're in the realm of kexts and custom kernels, darwin-drivers or darwin-kernel might be a better place to ask this sort of question than darwin-dev.

--Amanda

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References: 
 >Cancel Sleep (From: Andrew James <email@hidden>)
 >Re: Cancel Sleep (From: Terry Lambert <email@hidden>)
 >Re: Cancel Sleep (From: David Alger <email@hidden>)
 >Re: Cancel Sleep (From: "Jordan K. Hubbard" <email@hidden>)
 >Re: Cancel Sleep (From: Brian Mastenbrook <email@hidden>)
 >Re: Cancel Sleep (From: "Jordan K. Hubbard" <email@hidden>)
 >Re: Cancel Sleep (From: Amanda Walker <email@hidden>)
 >Re: Cancel Sleep (From: Andrew James <email@hidden>)



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