AWTGLCanvas swapbuffer always one frame delay in os x

[hubert]

Hi,

I am using AWTGLCanvas with lwjgl 2.9.1 in os x. Our app's opengl rendering is only triggered from repaint event. I found when mouse clicked and triggered repaint event, the previous mouse click drawing showup after opengl swap buffer. The same code in Linux and windows both working fine. Is there any issue in os x causing this buffer delay?

Thanks

Hubert