Need to know exactly what Roku you have. Is it a TV or a player? If it's a player, how is it connected to the TV, and what make/model TV is it?
Dan
Roku Stick (3600), Ultra (4640), Ultra (4670), Ultra (4800), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.