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I'm considering buying a Raspberry Pi or compatible solution. My problem is that I could not find how to achieve a dual head configuration.

I would like to attach two 1920x1200 displays by digital connection (HDMI, DVI, DisplayPort, etc.). Any ideas how to achieve such hardware configuration?

Grzegorz Wierzowiecki
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3 Answers3

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Simple! :) Buy TWO Raspberry Pies and hook them up with ethernet cable. Then use synergy to hook up the two systems in a virtual multihead config. See http://synergy-foss.org/ for more details.

Apart from that - there's not much you can do now as hdmi & composite cannot be used simultaneously.

This may change once we find out more about how to use the DSI video connector.

Maria Zverina
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At present I believe this to be a no-go:

There are two outputs on the RPi - the hdmi and the composite, however the composite is turned off when hdmi is connected.

You can get hdmi splitters, but that will just mirror the display on the two outputs, so if you're after that then fine.

Jon Egerton
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Well, now the Raspberry Pi 4 model B has come out with two Micro HDMI ports, so I think that gives the best solution to the problem?

If you don't want a Pi 4, it seems that buying two Pis may still be the next best option. But I would use x2x instead of Synergy to connect them, because it is free software.

For additional displays, I noticed that there are USB 3 to HDMI adapters, which could be used with the Raspberry Pi 4 B, which has two USB 3.0 ports, however such adapters don't work well with Linux. There is a related question "USB to VGA on Linux" which I found helpful.

Metamorphic
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