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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>
Cc:        freebsd-mobile@freebsd.org
Subject:   Re: Suspend drains battery on IBM T42
Message-ID:  <20051019091858.3ea880bd@localhost>
In-Reply-To: <20051018192903.GB27080@holestein.holy.cow>
References:  <1129300711.742.6.camel@RabbitsDen> <434FA5CA.31658.856AD66D@localhost> <20051018073526.GC2987@lbl.pl> <20051018104551.0a7e7a45@localhost> <20051018192903.GB27080@holestein.holy.cow>

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[-- Attachment #1 --]
Parv <parv@pair.com> wrote:

> in message <20051018104551.0a7e7a45@localhost>,
> wrote Fabian Keil thusly...
> >
> > KubaTyszko <kuba@lbl.pl> wrote:
> > 
> > > > 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.
> > 
> > AFAIK there are ThinkPads out there which support S4BIOS.
> > With those laptops and FreeBSD Suspend to Disk should work.
> 
> 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=MIGR-4PESMK>;

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

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

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