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I'm fairly new to Ubuntu and the Linux world, but whenever I turn on the Night Light feature on my laptop running Ubuntu 18.10, my screen completely tint-flashes with orange then goes back to normal as if I never turned on Night Light. Yet Ubuntu still says it's on.

It turns out that my issue was being caused by the extension I will as soon as I using.

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    If you have found the cause, please post it with a solution/workaround as an answer below by clicking the "answer your question" button below to help future readers. – pomsky Nov 05 '18 at 07:45

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Possible Duplicate of night-light-and-redshift-dont-work

Go to: https://www.computercorrect.com/2018/operating-systems/linux/ubuntu/ubuntu-night-light-tips-tweaks/

To find out how to reset and tweak night light settings.

Synopsis: The easiest way to control your night light settings is dconf editor, which is a low level system and settings manager.

  1. First run sudo apt-get upgrade from your terminal.
  2. Then run sudo apt-get install dconf-editor -y
  3. You will now find an app on your desktop which looks like a magnifying glass with a tick in it. This is dconf, open it.
  4. In the bar at the top you will see a file path.
  5. Change this to org/gnome/settings-daemon/plugins/color/night-light-temperature or alternatively click the search icon and search for "night light".
  6. You will see at the bottom you can set a custom value. Use this to set the night light to a strength you prefer.
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    Nevermind, I figured out that it was my desktop extension, Extend Panel Menu to blame for my problems, thank you for the help though – Anthony Nov 05 '18 at 06:41