lets hope this is not considered spam;
but i have an idea! (ive actually slept !)
Since fullscreen mode does not work, ive been thinking and thinking. how about this:
you have to put in your Y and X-Pixel sice. Lets assume it is 1024x768. Lets also asume your Screen Size is 1600 by 900.
What if instead of streching the game window a black frame surrounds the game window for some sort of "cinematic" fullscreen?
sum thing like this:
i dunno, i had this idea playing SNES just couple of minutes ago. there is this module that allowes you to put in GB games inside.
cuz if you push the bumper you have a variaty of bg's to choose from, and also the black one surrounding errything :3
JUST AN IDEA!