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    One monitor does not work properly after startup

    Hi! I have this problem: I have two monitors (an Acer and a Samsung). My graphics card is a GeForce GTX 1060. Until recently both monitors worked fine in Kubuntu. Recently I have this problem: The Samsung monitor looks fine when the BIOS and Grub are running, but when Kubuntu starts it goes black. I can see that Kubuntu still COUNTS it as connected - e.g., I can move windows to it and back using keyboard shortcuts. But nothing shows up on it.

    Workaround is:

    1. Go to System Settings -> Display and Monitor.
    2. Disable the Samsung monitor and apply.
    3. Re-enable it and apply.
    4. Now it works as usual - until the next reboot.

    It started happening yesterday. I do not know that I did or changed anything to trigger it. I tried to update all my software using Muon, but that made no difference.

    Does anyone have an idea for how to resolve this?

    #2
    UPDATE: Alternative workaround found:

    1. Press PrtScn to launch Spectacle.
    2. In Spectacle, click "Take a new screenshot".
    3. Suddenly the other monitor wakes up!

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      #3
      Originally posted by Spectrum View Post
      UPDATE: Alternative workaround found:

      1. Press PrtScn to launch Spectacle.
      2. In Spectacle, click "Take a new screenshot".
      3. Suddenly the other monitor wakes up!
      Updated finding: Taking a screenshot with scrot or KSnapshot does not wake up the dark monitor. But in both cases the screen shows up correctly on the screenshot (i.e., not dark).

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