We found out, what is causing the black screen. it is the tilt parameter in the .vsh file ... on some systems you maybe get a black screen, if you use:
const vec2 angle = vec2(0.0,-0.0);
try to use something slightly larger like:
const vec2 angle = vec2(0.0,-0.001);
it should fix it and depending what you are playing vertical or horizontal games, change it accordingly.