http://bugs.winehq.org/show_bug.cgi?id=17260
--- Comment #8 from Stefan Dösinger stefandoesinger@gmx.at 2011-06-12 04:59:17 CDT --- Does your GL implementation support GLX_EXT_swap_control? We need this to implement WGL_EXT_swap_control, which in turn is used by wined3d to implement vsync. If this extension is not supported, but GLX_SGI_swap_control or GLX_SGI_video_sync are supported we could implement vsync in an alternate way.