Dear All,

I have encountered a strange effect if a try to resize the osgviewer
window (and my own application) with the mouse on a
windows xp dual core machine.

If I continuously resize the window then after a while the window
stops rendering and displays only a white background. I was only
able to reproduce the problem on machines with a dual core cpu.

After some debugging I discovered that wglMakeCurrent in
RenderSurface_Win32.cpp often fails while resizing the window.
Sometimes it fails with return code 2004 but in rare cases it fails
with return code 6 (ERROR_INVALID_HANDLE). After that the
function always returns that error and the viewer stops rendering.

Has anyone experienced the same problem? It seems to be a problem
with thread synchronization. Should I checkout the latest version from cvs?

I am using OSG 1.0 running on windows xp.
The machines are equipped with a dual core amd processor and
different nvidia cards (7600 GT, 7800 GTX)
nvidia drivers are 83.91 and 84.21


Regards,
Reinhard

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