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Directx9.0 application hanging because of switchable graphics card in hp laptop

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i m using directx9.0 based application in my laptop with switchable graphics card (intel hd and nvidia 2 GB) my application hangs very frequently.

Same application if I run on different laptop with only nvidia gfx card works fine.


where is the problem.


Kindly help me out.

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It's almost certainly down to Optimus guessing incorrectly about which graphics card to give your game.


You can persuade it to pick the right one easily enough though - see this recent thread http://www.gamedev.net/topic/664696-unable-to-toggle-fullscreen-mode/


The quickest fix is to add this to your code somewhere:

extern "C" { 

 _declspec(dllexport) DWORD NvOptimusEnablement = 0x00000001;


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