[Qemu-devel] Re: [Qemu-commits] [COMMIT c0b1905] qemu/pci: reset device registers on bus reset

[Avi Kivity]

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<address@hidden>
> > >
> > > 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.