Date: Wed, 10 Sep 2003 16:12:43 +1000
From: Stephen Rothwell <sfr@canb.auug.org.au>
To: Pavel Machek <pavel@suse.cz>
Cc: mochel@osdl.org, benh@kernel.crashing.org, axboe@suse.de,
       torvalds@osdl.org, linux-kernel@vger.kernel.org
Subject: Re: [PM] Passing suspend level down to drivers
Message-Id: <20030910161243.42808c95.sfr@canb.auug.org.au>
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On Wed, 10 Sep 2003 01:07:55 +0200 Pavel Machek <pavel@suse.cz> wrote:
>
> I'd not worry about runtime states for now. [If user wants to sleep
> one device, we probably can allow that, but I do not think it is
> reasonable to do much more for 2.6.X]. That leaves us with:
> 
> APM suspend-to-ram
> APM suspend-to-disk

We do not know which of these is going to happen, it is entirely up to
the BIOS writers and the BIOS configuration ... i.e. on my laptop, I
have two suspend buttons - one for suspend to ram, one for suspend to disk,
but under APM the kernel merely gets a SUSPEND event no matter which
button I press.

However, there is APM standby

On another note, APM does allow for individual device power management
(i.e. you can tell the BIOS "suspend the first disk" or "power off
all displays").  I have been wondering if we want to disable the BIOS's
device power management now that we are begining to do it ourselves.
-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/
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