From mboxrd@z Thu Jan  1 00:00:00 1970
From: "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [PATCH 10/10] x86, ACPI: default to reboot via ACPI (again)
Date: Wed, 12 Nov 2008 21:25:58 -0800
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To: Zhao Yakui <yakui.zhao@intel.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>, Avi Kivity <avi@redhat.com>, Ingo Molnar <mingo@elte.hu>, Len Brown <lenb@kernel.org>, Stephen Rothwell <sfr@canb.auug.org.au>, Andrew Morton <akpm@linux-foundation.org>, Matthew Garrett <mjg@redhat.com>, Andrey Borzenkov <arvidjaar@mail.ru>, "linux-acpi@vger.kernel.org" <linux-acpi@vger.kernel.org>, "Brown, Len" <len.brown@intel.com>, Thomas Gleixner <tglx@linutronix.de>, Eduardo Habkost <ehabkost@redhat.com>

Zhao Yakui wrote:
> Maybe the 0xCF9 port is defined for NVidia, SiS and Several others
> vendor. But we can't say that it is appropriate for most boxes. 
> Of course IMO it is not a generic solution for reboot.
> At the same time the value written to the 0xCF9 I/O port should not be a
> fixed value. Maybe it varies on different vendors/chipset. Even the
> value will vary on the boxes from different BIOS vendors although the
> boxes are based on the same chipset. 
>     And the value should be provided by BIOS. If BIOS doesn't provide
> the above info, it is not safe to use them. 

We all agree that we should try to get the ACPI stuff to work as the 
first instance.  **THAT IS ALL THE HELP WE WILL GET FROM THE BIOS**.
Now, it isn't working.  Now what do you do?

In short, unless you have anything concrete to add to this discussion, 
please stop pontificating.

	-hpa