Blender 2.76 is rendering only a portion of the scene.
OS: Ubuntu 16.04.1 LTS; kernel: 4.4.0-51-generic; video card: Nvidia GeForce 6600 GT; Nouveau driver.
No alterations to Blender's default configuration were made: I simply started Blender up and clicked on the render button so it would render the default cube scene. Although the on-screen rendering was incomplete, the rendered scene was complete as a saved image.
I will try the Nvidia driver with it; however, I have been unable to get an efficiently usable desktop environment using that driver (incorrect resolution with screen badly offset).