Share screen of qube with another qube

deeplow · April 9, 2021, 3:35pm

A past discussion on Video conferences in Qubes lead to the creation of a github issue which culminated in the documentation of how to this. Thanks to everyone involved!

The Problem

We all know the frustration of having to demo a project on one AppVM A but having our regular videoconferencing software in AppVM B. One has to install/start the software on the other one, making an overall bad experience. Sometimes even having to do this in a rush because we had forgotten about this “detail”.

The Solution

Having an option to Share Screen to AppVM on AppVM A which would show as a virtual camera on AppVM B with the screen from A . Then on the videoconferencing software all the user would have to do is select that virtual camera to share the screen.

A guide on how to do this is linked bellow (disclaimer: it’s a bit technical):

github.com

Qubes-Community/Contents/blob/master/docs/configuration/screen-share.md


How to Share A Screen Across Qubes
==================================

> Warning:
> This guide involves opening up a TCP port between qubes. This is discouraged from the security standpoint and should only be used as a last resort, use sparingly.

## Terminology
PRESENTATION_QUBE is the Qube you want to view the screen from

CONTENT_QUBE is the Qube that has the window you want to share

## Setup The Shared Screen Server

Choose one of these sub-sections depending on whether you want to open a new screen (increased isolation), or use an existing monitor or screen.

### If You Want To Share a New Screen

In the Content Qube:

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