Re: [PATCH 1/3] PM: Introduce new top level suspend and hibernation callbacks (rev. 8)

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On Sun, 13 Apr 2008, David Brownell wrote:

> I sort of agree.  Looking at it from a whole-system perspective,
> suspending needs to be able to chitchat with userspace ... and I
> don't think that can be done *before* writing to /sys/power/state
> in an acceptably generic/portable way.  (Briefly, applications
> need to have clean stopping points and be able to arrange system
> wakeup.  They may well have more work to do than most drivers.)

Pavel's recent work aside, the only way to initiate a system sleep is 
from userspace.  So it seems natural for all application notifications 
to be made by the initiating program, perhaps via dbus.

Alan Stern

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