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I did not do anything for this to happen, it just happened one day when I started up Minecraft. When I went into full-screen mode, my Minecraft showed up on both my monitors.
However, I'm only able to move my mouse on my main monitor (on the right in the pictures - the cursor is invisible), while the buttons of the Minecraft menu only react to the mouse movement on my second monitor.

  • I have tried switching the main monitor, but it doesn't help.
  • I have also tried to go into full-screen mode in the settings, but the same happens, except my main monitor goes black instead.

It's the same on all versions of Minecraft.

The image below shows what happens when I go into the settings and turn on full-screen. You can see I have my mouse on the right monitor on "Multiplayer", but it shows up only on the left monitor:

enter image description here

And the following image is when I press F11, and, as you can see, the right monitor has just gone completely black but I can still only use the mouse on the main monitor:

enter image description here

  • When you say "all versions of Minecraft", what did you test? There was for example a big change to fullscreen mode in 1.13, did you test 1.12.2 as well? – Fabian Röling Jul 4 '19 at 16:49
  • I mean it sometimes works to go into fullscreen and sometimes it doesn't and my computer just crashes. I went into, 1.12, 1.13, 1.14, and 1.8. It was the same with all. – Teddie Novak Jul 4 '19 at 19:36
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Roll back to old Nvidia drivers. I had the same exact problem.

If you want the exact driver, I used these.

  • It did not work changing my driver to an older one. – Teddie Novak Jul 8 '19 at 16:28

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