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ohboy21
Asked: 2016-03-05 03:21:31 +0800 CST

How to mirror two external screens at a Thinkpad X1 2015?

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My setup looks like this:

  • Lenovo X1 2015
  • Two external screens attached
  • Running Ubuntu 15.04

What I want: Close the laptop lid and mirror both screens, so not extending them but let them display the same content.

What happens now: When I click "mirror" in the display settings, the internal display and one external gets mirrored, and the second external display stays black.

Who can help? What do I have to do to mirror two external monitors?

multiple-monitors

1 Answers

  1. Best Answer

    Ok, I found the answer myself. Here are the steps:

    1. Open the notebook lid
    2. Attach the external two screens
    3. Go to the Display settings in the System Settings
    4. Deactivate the internal screen (but leave it physically open)
    5. install xandr (sudo apt-get install xandr)
    6. Go to the terminal and list all the available monitors. Therefore, just execute xandr

    7. Now execute following command and replace the output-type with yours:

      xrandr --output DP2-1 --same-as DP2-2

    The last command, xrandr --same-as will let you mirror whatever monitors you wish.

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