Does glFinish behave like regular OpenGL on PowerVR?

[desperado]

Hello,

I dug a little further and what irritated me was this post by JoeDavis from 6 years ago where he claims that the behaviour of glFlush and glFinish ist platform dependent:

Synchronized output when rendering to an FBO with an eglImage attached

I maybe found a solution, but I think that it is a workaround for a bug and shouldn’t be necessary. If I bind the FBO and do a glReadPixels(0,0,1,1,…) (which costs me about 30-40ms) the problem is gone. Not sure about the OpenGL spec, but I would assume that glFinish or glFlush should be enough to have valid data in memory.

I know it is possible to influence the behaviour of these functions for certain platforms, usually via powervr.ini. However, does PVR require board designers to provide standard-conformant behaviour as default?