I actually got it going with Steam Bigpicture now. The trick with my undo command was to add the && in the sh -c command. See below. Do sh -c “kscreen-doctor output.DP-1.mode.3840x2160@60 output.HDMI-A-1.disable” Undo sh -c “setsid steam steam://close/bigpicture && kscreen-doctor output.DP-1.mode.3440x1440@180 output.DP-1.primary output.HDMI-A-1.enable” Haven’t tested HDR yet but this at least gives me the confidence to go get a dummy plug so both my displays switch off when streaming.