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I have a custom VR device I'm testing and I'm looking to do something which should be simple with my desktop monitor settings. Essentially I want to go from a regular desktop, this:

enter image description here

To having this screen repeated side-by-side split down the middle, like this:

enter image description here

And it's literally just a real-time copy of the desktop.

For reference, I am using a 800 x 480 display, in case that's relevant.

Ideally I would like to put my computer permanently into this display mode, so that every time it boots up it's like this automatically.

Thanks in advance for any help!

EDIT - I want to confirm that I'm trying to do this simple task on a Raspberry Pi, which should be a type of debian Linux if I understand correctly.

JDS
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1 Answers1

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I see two parts here:

  1. Split the screen into two virtual displays
  2. Mirror the left display on the right.

Splitting the screen

Splitting the screen is addressed in the post
How to vertically split widescreen into two virtual workspaces on Ubuntu/Gnome?.

This uses the free and open-source Fake Xinerama. Using it is described in detail in this answer. If this does not work for you, then another answer uses xrandr to split the screen.

An alternate method that uses Compiz is described in the Ask Ubuntu post Split monitor in two.

Mirroring the display

See the post Mirror display on Ubuntu 18.04 for an answer that uses xrandr to mirror the displays:

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

Running xrandr without arguments gives the list of displays and their resolutions, to be used as above.

harrymc
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