[vbox-dev] 回复： on Vertical synchronization support of simulated videocard in Vbox

[李彪]

hi, 


below is the error output when requiring vertical sync.
so, I wonder, simulated video card dose not support this function call ?
==========================


This is Decode Call Back String!
WaitForVerticalBlank 1 err: 80004001
This is Decode Call Back String!
WaitForVerticalBlank 1 err: 80004001
This is Decode Call Back String!
WaitForVerticalBlank 1 err: 80004001
This is Decode Call Back String!
WaitForVerticalBlank 1 err: 80004001

 
 
------------------ 原始邮件 ------------------
发件人: "mikhail sennikovsky"<mikhail.sennikovsky at oracle.com>;
发送时间: 2012年2月27日(星期一) 晚上6:01
收件人: "李彪"<cloudbot-dev at sinobot.com.cn>; 
抄送: "vbox-dev"<vbox-dev at virtualbox.org>; 
主题: Re: [vbox-dev] on Vertical synchronization support of simulated videocard in Vbox

 
                   Hi Thomas,
     
     Could you specify how exactly do you ask for "Vertical     synchronization", which does not work?
     Setting D3DPRESENT_PARAMETERS::PresentationInterval to     D3DPRESENT_INTERVAL_ONE in IDirect3D9::CreateDevice should produce     no error as far as I can tell.
     
     Mikhail
     
     On 27.02.2012 8:13, 李彪 wrote:                     hi, all
         
         
         now I have a windowsXP App that use DirectX technology           to display the high-resolution real-time video.
         however, it works well in physic machine but not in           vbox winXP vm.
         
         
         finally,  we find the root cause is that when we ask           for "Vertical synchronization" on           simulated video card in VM, it reports error and no display at           all. if we don't ask "Vertical synchronization"           , it works well.
         
         
         so my question is :
         
         
         - does simulated video card in Vbox support "Vertical synchronization" function ?
       
       - is there any patch for this problem ?
       
       
       thomas
       
              
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