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Date:      Wed, 15 Jan 2003 16:16:04 +0100
From:      Mark Santcroos <marks@ripe.net>
To:        "Daniel O'Connor" <doconnor@gsoft.com.au>
Cc:        current@FreeBSD.ORG, mobile@FreeBSD.ORG
Subject:   Re: FreeBSD 5.0 and Dell notebooks
Message-ID:  <20030115151604.GA51068@laptop.6bone.nl>
In-Reply-To: <1042614629.13691.116.camel@chowder.gsoft.com.au>
References:  <Pine.BSF.4.21.0301141229290.39326-100000@root.org> <3E248251.4050204@isi.edu> <20030115002356.GA87114@solaris.ru> <20030115065045.GA45556@carbon.berkeley.netdot.net> <3E25063F.9000508@isi.edu> <1042614629.13691.116.camel@chowder.gsoft.com.au>

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On Wed, Jan 15, 2003 at 05:40:29PM +1030, Daniel O'Connor wrote:
> On Wed, 2003-01-15 at 17:27, Lars Eggert wrote:
> > With a partition created by Dell's make-suspend-partition floppy, I 
> > could suspend and resume with save-to-disk on 4.6. (I have since trashed 
> > the partition, because I needed its partition table slot.) So there is 
> > some hope this might work on -current also.

I tried to accomplish it on -current, creating the partition etc, but
didn't succeed. My conclusion was that it won't work.

> Provided you stick to APM..
> The suspend to disk thing is only available with APM - 

This is not 100% true. See S4BIOS in the ACPI 2.0 spec.

> an ACPI OS is supposed to do all of that stuff without help from the BIOS.

However, it comes down to the same as what you say here is true.

> Unfortunately no one has written suspend to disk support for FreeBSD yet
> :(

I concluded the same and started on a p4 branch myself. Realisticly
speaking I know the change that I will ever finish it is small.
Things I did until now are exploring the mechanisms and code to see what
would need to be done. I have also looked at the Linux swsuspend
implemenation.
However, I expect that there is a big need for this which is only going to
grow with about all laptops being produced now being ACPI only, and the
vendors only looking at Microsoft. That need might attract more people to
work on this in FreeBSD.

Mark

-- 
Mark Santcroos                    RIPE Network Coordination Centre
http://www.ripe.net/home/mark/    New Projects Group/TTM

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