Hi All, I am experiencing this too.
After my monitors have lost the display port signal from my machine (either during suspension or blank screen), changing the nightlight settings is no longer possible and the last used setting is permanently engaged. Rebooting fixes the issue, however. I am on Ubuntu 20.04.1 LTS and am using three monitors in series via MST. Many thanks for any guidance. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-settings-daemon in Ubuntu. https://bugs.launchpad.net/bugs/1686895 Title: Gnome Night Light stays warmer after overnight suspend Status in GNOME Settings Daemon: Fix Released Status in gnome-settings-daemon package in Ubuntu: Won't Fix Bug description: Gnome Night Light is scheduled from sunset to sunrise. In the evening, the screen color turns warmer as expected. Going to bed, the computer is put in suspend mode. The next day, after sunrise, the warm color is still on and stays on. Turning Gnome Night Light off (and on) does not help. The Night Light settings clearly show the correct time of day in the slider in the blue color section. * Ubuntu 17.04 * gnome-control-center: Installed: 1:3.24.0-0ubuntu1 To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-settings-daemon/+bug/1686895/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp