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Date: Wed, 28 Jan 2004 08:34:14 -0700 (MST)
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To: past@noc.ntua.gr
From: "M. Warner Losh" <imp@bsdimp.com>
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cc: randy@psg.com
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Subject: Re: sleeping too lightly
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In message: <4017BB7A.6090307@noc.ntua.gr>
            Panagiotis Astithas <past@noc.ntua.gr> writes:
: Randy Bush wrote:
: > thinkpad t40p
: > pretty current
: > 
: > S3 does suspend, and i have successfully tied it to the key and lid.
: > but it seems to burn battery anyway, like five hours eats 40% of it,
: > and it sleeps quite warmly.  any clues?
: 
: Isn't it supposed to? I believe that you need S4 for complete poweroff. 
: acpiconf(8) says something along these lines, too.

S4 isn't completely off.  That's S5.  S3 is a low power mode that's
'fast' to recover from (suspend to RAM in old APMese).  S4 and S4BIOS
are both suspend to disk.

Warner