1

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 .bash_profile with:

[[ -z $DISPLAY && $XDG_VTNR -eq 1 ]] && startx
2
  • I'd start by researching xrandr, eg. magnatecha.com/dual-monitors-with-openbox-and-xrandr (not a solution but an intro to the concept). My first goal would be a continuous display, ie., one where Chromium probably comes up on only one screen. Using a mouse might help.
    – goldilocks
    Feb 11, 2020 at 15:54
  • The title of your question is wrong. A RPi 4B cannot run with Raspbian Stretch. It has to use Raspbian Buster.
    – Ingo
    Feb 11, 2020 at 18:20

1 Answer 1

0

Don't fiddle with the config files.

Run Screen Configuration which has options to configure both screens. (This is basically a front end to xrandr.)

This is a GUI but AFAIK the only way to configure multiple screens.

If you hadn't wasted space with NOOBS you would have plenty of room for Raspbian with Desktop.

1
  • The comment about NOOBS is irrelevant to the answer and unnecessary personal opinion
    – sberder
    Mar 2 at 8:03

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.