dual monitors not working

[ob7]

When I attach an external monitor to my laptop ( which gets mirrored ) jfbview outputs multiples of what is being displayed all overlapping each other. Nor does it get the screen size correct. Any idea why? Green pdf viewer works but I can't switch virtual TTY's when its being used for some reason and I've always used jfbview before having this problem.

[ob7]

I disabled my laptop monitor with kernel parameter "video=eDP-1:d" ( eDP-1 is the name of my laptop screen, find yours in /sys/class/drm )

So when I disable my laptops monitor jfbview works as expected. For whatever reason if there is two monitors connected jfbview does not render correctly.