[JAMF]

That is actually weird, because if you get black bars, you have a wide screen? 1440x1080 is a 4:3 screen. Are you sure your display's native resolution is 1440x1080, or is it actually a 1920x1080 one?

I was going from that info and a 4:3 screen gets SaveAspect=1 in the conf.ini.