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Tags: 18.04   multiple-monitors  
Link: 🔍 See Original Answer on Ask Ubuntu 🔗

Title: No option to mirror Displays on 18.04 - DELL M3800
ID: /2018/12/01/No-option-to-mirror-Displays-on-18.04-DELL-M3800
Created: December 1, 2018    Edited:  June 12, 2020
Upload: November 24, 2022    Layout:  post
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From this answer: How can I mirror one of the screens in a 3-monitor setup?p try using:

xrandr --output eDP-1-1 --output HDMI-1-2 --output HDMI-1-2 --same-as HDMI-1-1

In the accepted solution above, screen 3 is mirrored to screen 2 but the primary screen is not mirrored.

Another option is switching to Unity desktop: GNOME in Ubuntu 18.04 and multi monitor setup

Click the gear icon next to the Sign In button as shown below:

Ubuntu 5 DE.png

Note: Fresh 18.04 installs may need to install Unity Desktop. 16.04 Upgrades will likely have Unity in place by default. See: How can I make Ubuntu 18.04 / 18.10 desktop use Unity (be like Ubuntu 14.04)?

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