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Is it possible to use more than two monitors in Ubuntu?

If so, which graphics cards are known to work for example with three monitors in Ubuntu?

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To the best of my knowledge, it's "sort of possible" - there are some special requirements and some limitations when you get it working. This question on apparently represents the current state of the art. – j-g-faustus Feb 12 '11 at 12:57
possible duplicate of Any really decent way to get three monitors? – bain May 27 '14 at 9:43

Ordinary graphic cards support only up to 2 monitors. Laptop usually support own monitor (LVDS) and one external (VGA/DVI/HDMI), while desktop has 2 monitor ouptups.

You can use more graphics cards if your motherboard and graphics card support. Example:

Some (newer) ATI cards support DisplayPort and you can use more monitors (I don't know how much exactly). As you can see in upper video, there are 24 monitors and only 4 cards which means 1 card for 6 monitors.

I found some article.

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