From: "H. Peter Anvin" <hpa@zytor.com>
To: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: x86@kernel.org, linux-acpi@vger.kernel.org, lenb@kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/3] X86: Revamp reboot behaviour to match Windows more closely
Date: Thu, 09 Dec 2010 14:32:52 -0800 [thread overview]
Message-ID: <4D015914.1040009@zytor.com> (raw)
In-Reply-To: <20101209223201.GA23894@srcf.ucam.org>
On 12/09/2010 02:32 PM, Matthew Garrett wrote:
> On Thu, Dec 09, 2010 at 02:25:05PM -0800, H. Peter Anvin wrote:
>> On 12/09/2010 01:46 PM, Matthew Garrett wrote:
>>> Windows reboots by hitting the ACPI reboot vector (if available), trying
>>> the keyboard controller, hitting the ACPI reboot vector again and then
>>> giving the keyboard controller one last go. Rework our reboot process a
>>> little to default to matching this behaviour, although we'll fall through
>>> to attempting a triple fault if nothing else works.
>>>
>>> Signed-off-by: Matthew Garrett<mjg@redhat.com>
>>
>> When this was discussed before we agreed to use ACPI reboot by default
>> with an ACPI cutoff date; this doesn't have any such cutoff.
>
> Windows doesn't either. Older machines simply won't have the appropriate
> flag set in their FADT.
>
Windows doesn't get validated on old hardware.
-hpa
next prev parent reply other threads:[~2010-12-09 22:32 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-09 21:46 [PATCH 1/3] X86: Revamp reboot behaviour to match Windows more closely Matthew Garrett
2010-12-09 21:46 ` [PATCH 2/3] ACPICA: Fix access width for reset vector Matthew Garrett
2010-12-09 22:41 ` Rafael J. Wysocki
2010-12-09 23:12 ` H. Peter Anvin
2010-12-09 23:26 ` Matthew Garrett
2010-12-09 21:46 ` [PATCH 3/3] ACPI: Bug compatibility for Windows on the ACPI reboot vector Matthew Garrett
2010-12-09 22:36 ` H. Peter Anvin
2010-12-09 22:41 ` Rafael J. Wysocki
2010-12-09 22:25 ` [PATCH 1/3] X86: Revamp reboot behaviour to match Windows more closely H. Peter Anvin
2010-12-09 22:32 ` Matthew Garrett
2010-12-09 22:32 ` H. Peter Anvin [this message]
2010-12-09 22:38 ` Matthew Garrett
2010-12-09 22:40 ` H. Peter Anvin
2010-12-09 22:51 ` Matthew Garrett
2010-12-09 22:53 ` H. Peter Anvin
2010-12-09 22:58 ` Matthew Garrett
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