[vbox-dev] on Vertical synchronization support of simulated video card in Vbox

mikhail sennikovsky mikhail.sennikovsky at oracle.com
Mon Feb 27 02:01:01 PST 2012

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.


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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> vbox-dev at virtualbox.org
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