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Date: Wed, 19 Oct 2005 09:18:58 +0200
From: Fabian Keil <freebsd-listen@fabiankeil.de>
To: Parv <parv@pair.com>
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Cc: freebsd-mobile@freebsd.org
Subject: Re: Suspend drains battery on IBM T42
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Parv <parv@pair.com> wrote:

> in message <20051018104551.0a7e7a45@localhost>,
> wrote Fabian Keil thusly...
> >
> > KubaTyszko <kuba@lbl.pl> wrote:
> >=20
> > > > Have you tried the suspend to disk?  That's what Windows calls
> > > > hibernation.
> > > i am afraid that STD does not work under thinkpads and freebsd.
> >=20
> > AFAIK there are ThinkPads out there which support S4BIOS.
> > With those laptops and FreeBSD Suspend to Disk should work.
>=20
> I am using T42 (2373-5TU) and have suspend-to-disk currently
> disabled in BIOS (i think) & hw.acpi.s4bios is 0.  Given that if i
> can turn on suspend-to-disk & hw.acpi.s4bios changes to non-zero,
> how do i go about testing it?

You have to create a special partition where the "hibernation file"
can be stored.

<http://www-307.ibm.com/pc/support/site.wss/document.do?lndocid=3DMIGR-4PES=
MK>

Afterwards you should be able to enter S4BIOS with acpiconf -s S4OS.

Fabian
--=20
http://www.fabiankeil.de/

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