Jetson K1 - in Cuda samples, "fluidsGL" produces a grainy green screen

The Cuda samples all seem to work, except for this one called fluidsGL, which outputs a grainy green screen. I could attach an image here, but there is no option to attach unfortunately. The output of the program is:

fluidsGL Starting…

[fluidsGL] - [OpenGL/CUDA simulation] starting…
OpenGL device is Available
CUDA device [GK20A] has 1 Multi-Processors

Try clicking and dragging your mouse over it!