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Date: Fri, 5 Apr 2002 19:14:41 +0200 (CEST)
From: Mike Galbraith <mikeg@wen-online.de>
To: "Richard B. Johnson" <root@chaos.analogic.com>
cc: Arnvid Karstad <arnvid@karstad.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Problems rebooting from linux to windows...
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Message-ID: <Pine.LNX.4.10.10204051904210.654-100000@mikeg.wen-online.de>
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On Fri, 5 Apr 2002, Richard B. Johnson wrote:

> On Fri, 5 Apr 2002, Arnvid Karstad wrote:
> 
> > Hi, 
> > 
> > recently I've seen a few problems with several laptops and if one are so 
> > unfortunate that one needs to reboot into Windows after a session in linux.
> > Normal restart of windows never have a problem on the same machines, but if 
> > you go from Linux to for instance Windows by shutdown -r or reboot it will 
> > freeze half way into the booting process. 
> > 
> > A power cycle will hower fix this. 
> > 
> > Anyone got an idea about where to start looking? 
> > 
> > Best regards 
> > 
> > Arnvid Karstad
> 
> I have this same problem on my Compaq Presario. I think that this
> is because the BIOS was shadowed and used some writable-RAM somewhere.
> Linux seems to do a 'warm-boot'. The result being that some of the
> stuff that the BIOS counts on was wiped out by Linux, i.e.,
> stuff from E000:0000 -> E000:FFFF (the BIOS is normally at F000:0000).
> 
> My 'fix' is to cold-boot, i.e., processor reset during the shutdown.

FWIW, I also have a Presario, and reboot frequently between Windbloz
and Linux with zero problems. I've seen many many many problems wrt
Compaq (mostly crap bios) and Linux over the years, but ATM, I don't
have any.  (I put total >$20k into a 386-20 believe it or not.. was
shit hot box at the time:)

	-Mike

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