Re: Ask devices to powerdown before S3 sleep

From: Zwane Mwaikambo (
Date: Tue Jan 21 2003 - 05:55:37 EST

On Tue, 21 Jan 2003, Pavel Machek wrote:

> Hi!
> > > SUSPEND_RESUME phase is needed for turning off IO-APIC. [I believe
> > > SUSPEND_DISABLE should be so simple that errors just should not be
> > > there, and besides we would not know how to safely enable devices from
> > > such weird state, anyway]. Please apply,
> >
> > panic() is a bit on the extreme side no? I know diddly about ACPI and
> > the current code, but can't you check for _PS3 methods or _S3D mappings
> > for your devices before hand to be certain that the system can even go
> > down to S3 somewhat reliably?
> At this point, you already DISABLED half of devices, and you don't
> even know *which* ones. You can't just send them ENABLE and hope it
> works.

I meant checking before you even attempt starting the process of doing S3.



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