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Second monitor works only when I lock the PC and the lock screen is on. But when I log in the monitor doesn't work, the display doesn't detect any source. The monitor is detected in Settings, but when I try to toggle the monitor on, the toggle button just goes back to off state. It won't let me toggle it on.

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  • Can you provide more info? Laptop or desktop? How do you connect the second monitor to your computer? Commented Oct 3, 2015 at 15:21
  • It's desktop, it's connected via HDMI. But it worked now after disconnecting HDMI and starting the OS and then connceting HDMI again.
    – neX
    Commented Oct 4, 2015 at 16:47
  • I hav e had this periodically, connecting via VGA. no idea what triggers it or how to fix other than reconnecting :/ Commented Oct 10, 2015 at 22:35
  • It can get really annoying. I hope it gets fixed soon. Mod for Elementary OS IRC (he is also dev for EOS) said some dev will look at this problem when I linked him this question.
    – neX
    Commented Oct 12, 2015 at 20:37
  • I have same problem too, my second monitor undetected after i logged into my user account. I don't know how to reset second monitor setting.
    – user3192
    Commented Nov 23, 2015 at 9:11

1 Answer 1

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It worked now after disconnecting HDMI and starting the OS and then connceting HDMI again

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  • What's up with down vote? I hope this can help others with same problem.
    – neX
    Commented Oct 11, 2015 at 13:58

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