Run the hellogl_es2 example and unmaximize it. Resizing the window larger and then don't do anything. The view stops updating.

If you maximize the window, there is an area in the top left corner that stops updating while the rest of the view updates. The area at the top left corner is the same size as the view was before it was maximized.

This occurs with NVIDIA GeForce graphics card. It doesn't seem to occur in VMware. It has been reported to not affect NVIDIA Quadro graphics cards.

Using Alt+Tab to switch windows results in the things going back to normal.