OpenGL woes

Eric Pouech eric.pouech at
Sun Mar 2 13:40:44 CST 2003

Eric Pouech wrote:
> I've got a strange behavior with OpenGL:
> - an app A, tries to load another app B
> - on B startup, in x11drv init, the OpenGL initialization goes havoc:
>   after the dl_open is made, fs:teb gets corrupted (ie gets changed)
>   the point where this change is made varies over time (I assume, the
>   OpenGL lib creates a thread, and depending on thread sync, it happens
>   at various points)
> - more interesting, the second time one tries to launch B from A, it
>   succeeds (in that case the corruption doesn't occur)
> those "features" didn't appear before Alexandre latest fd changes to the 
> server, but I don't think that's a bug in there. It looks more like a 
> timing/sync issue that the latest changes uncovered, but it likely 
> existed before and where less prone to happen
> my OpenGL libs are from nvidia. Does anyone know what libGL does behind 
> our back ? is there we can do against it ?

anyone cares to discuss ?

Eric Pouech

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