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Date: Mon, 10 Nov 2008 23:20:12 +0200
From: Gleb Natapov <gleb@redhat.com>
Message-ID: <20081110212012.GD19381@redhat.com>
References: <20081110091134.11822.34230.stgit@dhcp-1-237.local>
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Subject: [Qemu-devel] Re: [Bochs-developers] [PATCH v3 6/6] Don't power down
	vga card onentering S3 state.
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To: Sebastian Herbszt <herbszt@gmx.de>
Cc: bochs-developers@lists.sourceforge.net, qemu-devel@nongnu.org

On Mon, Nov 10, 2008 at 09:25:02PM +0100, Sebastian Herbszt wrote:
> Gleb Natapov wrote:
>> This is needed to fool windows to enter S3. The trick works for XP and
>> Windows2003, but Vista still refuse to allow S3.
>>
>> Signed-off-by: Gleb Natapov <gleb@redhat.com>
>> ---
>>
>> bios/acpi-dsdt.dsl |   15 ++
>> bios/acpi-dsdt.hex |  373 ++++++++++++++++++++++++++--------------------------
>> 2 files changed, 204 insertions(+), 184 deletions(-)
>>
>> diff --git a/bios/acpi-dsdt.dsl b/bios/acpi-dsdt.dsl
>> index 280a05e..5fc3636 100644
>> --- a/bios/acpi-dsdt.dsl
>> +++ b/bios/acpi-dsdt.dsl
>> @@ -133,6 +133,21 @@ DefinitionBlock (
>>     }
>>
>>     Scope(\_SB.PCI0) {
>> +        Device (VGA) {
>> +                 Name (_ADR, 0x00020000)
>> +                 Method (_S1D, 0, NotSerialized)
>> +                 {
>> +                         Return (0x00)
>> +                 }
>> +                 Method (_S2D, 0, NotSerialized)
>> +                 {
>> +                         Return (0x00)
>> +                 }
>> +                 Method (_S3D, 0, NotSerialized)
>> +                 {
>> +                         Return (0x00)
>> +                 }
>> +        }
>
> Which vga card does need this? std, cirrus, vmware?
>
I tested with cirrus, but I believe std needs it too. Both of them to old
to support low power state. Don't know about vmware.

--
			Gleb.