From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43)
	id 1MvchV-00085W-6X
	for qemu-devel@nongnu.org; Wed, 07 Oct 2009 16:01:29 -0400
Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43)
	id 1MvchQ-000809-Eo
	for qemu-devel@nongnu.org; Wed, 07 Oct 2009 16:01:28 -0400
Received: from [199.232.76.173] (port=43144 helo=monty-python.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.43) id 1MvchQ-0007zn-5l
	for qemu-devel@nongnu.org; Wed, 07 Oct 2009 16:01:24 -0400
Received: from mx1.redhat.com ([209.132.183.28]:49646)
	by monty-python.gnu.org with esmtp (Exim 4.60)
	(envelope-from <avi@redhat.com>) id 1MvchO-00035B-TQ
	for qemu-devel@nongnu.org; Wed, 07 Oct 2009 16:01:23 -0400
Message-ID: <4ACCF38F.4040309@redhat.com>
Date: Wed, 07 Oct 2009 22:01:19 +0200
From: Avi Kivity <avi@redhat.com>
MIME-Version: 1.0
References: <200910051452.n95EphXY002170@d03av01.boulder.ibm.com>
	<4ACC4F43.1010906@redhat.com> <20091007195338.GA3923@redhat.com>
In-Reply-To: <20091007195338.GA3923@redhat.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Subject: [Qemu-devel] Re: [Qemu-commits] [COMMIT c0b1905] qemu/pci: reset
 device	registers on bus reset
List-Id: qemu-devel.nongnu.org
List-Unsubscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/pipermail/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Anthony Liguori <aliguori@us.ibm.com>, "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>, kvm-devel <kvm@vger.kernel.org>

On 10/07/2009 09:53 PM, Michael S. Tsirkin wrote:
> On Wed, Oct 07, 2009 at 10:20:19AM +0200, Avi Kivity wrote:
>    
>> On 10/05/2009 04:53 PM, Anthony Liguori wrote:
>>      
>>> From: Michael S. Tsirkin<mst@redhat.com>
>>>
>>> Reset BARs and a couple of other registers on bus reset, as per PCI
>>> spec.
>>>
>>>        
>> This commit breaks Windows XP restart.  After a restart Windows switches
>> from 800x600 cirrus logic vga to 640x480 standard vga.  My guess is that
>> this is due to two mutually-cancelling bugs:
>>      
> Could you please tell me how to reproduce the problem exactly?
> I tried several configurations but in all of them windows
> seems to keep 800x600 across restarts, and shows display adapter
> as cirrus vga.
>    

Clean Windows XP install (-smp 2), boot, reboot.

After restart it also loses S3 (so Standby is gr[ae]yed out in the 
shutdown menu).

-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.