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CreateDevice hangs

Started by kUfa Jan 30, 2007 at 5:04 AM 2 replies 1.6k views

Original Post

Jan 30, 2007 at 5:04 AM

Hi, I'm working on a multithreaded renderer on DX9. I've ensured that the window used by the device is created on the same thread that is calling CreateDevice to avoid the deadlocks mentioned in the SDK documentation. I have one very weird behaviour: the very first time (read the first one after a computer reboot) i launch my application on a multicore machine (running 2000/XP/Vista), the CreateDevice will hang if want a fullscreen presentation. If i want a windowed presentation, it's all fine. Everytime i'll restart the app it will work fine. Any idea why i could get this weird behaviour? Thanks in advance, /kufa

don

Jan 30, 2007 at 10:57 AM

Are you making any D3D calls from your WndProc?

kUfa

Author

kUfa

Jan 30, 2007 at 11:09 AM

Nope, but even if i did shouldn't it work fine since the window was created on the same thread?

/kufa

don

Feb 1, 2007 at 1:59 PM

I'm assuming that your app only creates a single device. Since the call to CreateDevice is hanging, it also means that your app doesn't have a valid IDirect3DDevice9 interface pointer yet, so I can't see how multithreading plays into this particular problem, *unless* you're calling through an uninitialized interface pointer in another thread and that is causing the hang. Just as a test, you could try blocking the other threads until CreateDevice has returned and see if that succeeds.

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