How do I enable screen share on a data projector connected via HDMI? I can see, that LibreOffice Impress is automatically shared if in presentation mode, but how to share video or just the whole screen itself. As a default, I can see just my desktop background and that's it.
If I understand the setup, your desktop connects to a monitor plus an HDMI cable goes from your desktop to the data projector. That means, you have two screens, in Control Center > Displays you can configure each screen to mirror each other. If so, what you see on your monitor should be seen on the projector as well.
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Yep. Just treat it like a second monitor or display. Here is the link to the instructions in the Ubuntu MATE Guide.
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