Re: Cancel Sleep
Re: Cancel Sleep
- Subject: Re: Cancel Sleep
- From: Michael Smith <email@hidden>
- Date: Tue, 1 Jan 2008 17:22:30 -0800
On Jan 1, 2008, at 2:55 PM, David Elliott wrote:
What exactly is the reason for requiring the system to go to sleep
and then be woken up again?
Closing the clamshell is an explicit instruction from the user to
sleep the system.
Your scenario is indistinguishable at the software level from my daily
routine, where I close the lid on my MBP, pull all the cables from it
and stuff it into my backpack. I don't stop to wait for it to sleep,
or manually sleep it; I expect that when I close the lid, it will go
to sleep and stay asleep.
On Jan 1, 2008, at 3:02 PM, David Alger wrote:
On Jan 1, 2008, at 4:55 PM, David Elliott wrote:
On Jan 1, 2008, at 3:30 PM, Michael Smith wrote:
Certain Apple portables do support running with the clamshell
closed, but with other constraints applied that make it clear
that the user intends for the system to be awake and that more or
less require that it have adequate access to cooling (keyboard
attached, external monitor attached, explicit wakeup after the
clamshell is closed).
If it doesn't have the cooling, it will get too hot. If and when
that happens, the OS should halt the machine to prevent damage. Mac
OS X is certainly smart enough to do this if temps reach an unsafe
temp.
You can't trust the OS to do it, and in fact the system doesn't; the
SMC will shut the system down hard if it is headed for a thermal
emergency.
The point here being that an x86 Macintosh portable without airflow is
almost certain to do this; a mode of operation that encourages the
user to put the system into an enclosed space (bag, pile of stuff,
etc.) is just not a viable thing.
= Mike
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