linux-kernel - Re: [PATCH] x86: Add reboot quirk for Dell Precision M4600

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Message-ID: <20110806065635.GE13220@elte.hu>
Date:	Sat, 6 Aug 2011 08:56:35 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Mel Gorman <mgorman@...e.de>
Cc:	tglx@...utronix.de, hpa@...or.com, bruno@...a-net.ch,
	mjg@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86: Add reboot quirk for Dell Precision M4600


* Mel Gorman <mgorman@...e.de> wrote:

> ACPI reboot does not work for Dell Precision M4600. Detect this
> machine via DMI and force the use of the PCI reboot method.
>     
> Reported-and-tested-by: Bruno Friedmann <bruno@...a-net.ch>
> Signed-off-by: Mel Gorman <mgorman@...e.de>
> ---
>  arch/x86/kernel/reboot.c |    9 +++++++++
>  1 files changed, 9 insertions(+), 0 deletions(-)

Weird - ACPI is the default Windows method of reboot - how come it 
does not work on that box? Does Windows work around this specific 
machine (unlikely), or is our ACPI boot sequence not 100% compatible 
with the Windows method (more likely IMO)?

Thanks,

	Ingo
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