Re: Ask devices to powerdown before S3 sleep

From: Pavel Machek (
Date: Tue Jan 21 2003 - 06:03:58 EST


> > > > 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.

All devices should support that -- BIOS should not advertise S3 if it
can not do that, and kernel should be fixed to work.


Casualities in World Trade Center: ~3k dead inside the building,
cryptography in U.S.A. and free speech in Czech Republic.
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