I just got a Shield TV and am trying to use it with my 29" LG UltraWide monitor, which has a resolution of 2560x1080. The only options I'm allowed in the resolution menu are 1920x1080, leaving me with black bars on either side of my display. Is there any way I can make Android TV work with my monitor's resolution? Official options preferred but root-based workarounds are welcome too.
Not sure it'll work, but it may be worth a shot. Using adb, run:
adb shell wm size 2560x1080
It may be possible that it might not support outputting at that resolution at all. If so, just run
adb shell wm size reset
I was gonna try on my nexus player, but adb has been wonky on it since the marshmallow update.