Interesting, I had a display plugged into my laptop and indeed the external HDMI display had night light enabled by the primary display did not.
The primary display was running 4K resolution with HiDPi scaling at 200%. I'll try to remember to open a new issue when I return from holiday. -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/1676131 Title: Gnome Night Light doesn't work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1676131/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs