I am booting a Pi 4 running the latest version of Raspbian Lite into Chromium kiosk mode and outputting the display to 2 monitors.
I have successfully hooked up the 2 monitors, but the displays are mirrored showing the same output on each screen.
My goal is to have an "extended" screen where Chromium goes fullscreen and is stretched equally across the 2 monitors.
To this point, I have made minimal configuration updates. I have used NOOBS to install Raspbian Lite. I then installed X Server, Openbox and Chromium. The Pi boots directly into Chromium in kiosk mode and loads the webpage as expected.
I have edited the Openbox config like:
xset s off xset s noblank xset -dpms setxkbmap -option terminate:ctrl_alt_bksp chromium-browser --disable-infobars --kiosk 'https.myurl.com'
And added a
[[ -z $DISPLAY && $XDG_VTNR -eq 1 ]] && startx