Re: Hibernation considerations

[Alan Stern]

On Sun, 15 Jul 2007 david@xxxxxxx wrote:

> >> for a pure hibernate mode, you will be powering off the box after saving
> >> the suspend image. why are there any special ACPI modes involved?
> >
> > Because, for example, on my machine the status of power supply (present
> > vs not present) is not updated correctly after the restore if ACPI callbacks
> > aren't used during the hibernation.  That's just experience and it's in line
> > with the ACPI spec.
> 
> so if a machine is actually powered off the /dev/suspend process won't 
> work?
> 
> remember that the system may run a different OS between the hibernate and 
> the resume, makeing any assumptions about what state the hardware is in 
> when you start the resume is a problem.

As I understand it, running a different OS between the hibernate and 
the resume would violate the ACPI spec.

Alan Stern

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