Night light icon shows up - but desktop colors don't change

I'm using a manual schedule for night light - and right now I'm within the schedule. Using Ubuntu 20.04

I see the 'Night light' icon in my status bar - and clicking it shows 'Night light is on', but my actual colors are still as bright as usual.

Dragging the slider from less <> more warm also has no effect on the screen color.

tail /var/log/syslog shows this:

Aug 16 02:11:49 beast gsd-color[1974]: unable to get EDID for xrandr-default: unable to get EDID for output
Aug 16 02:11:51 beast gsd-color[1974]: message repeated 30 times: [ unable to get EDID for xrandr-default: unable to get EDID for output]
Aug 16 02:11:52 beast gnome-shell[1650]: ../clutter/clutter/clutter-actor.c:10558: The clutter_actor_set_allocation() function can only be called from within the implementation of the ClutterActor::allocate() virtual function.
Aug 16 02:11:52 beast gsd-color[1974]: unable to get EDID for xrandr-default: unable to get EDID for output
Aug 16 02:11:57 beast gsd-color[1974]: message repeated 31 times: [ unable to get EDID for xrandr-default: unable to get EDID for output]

I'm guessing unable to get EDID for xrandr-default: unable to get EDID for output has something to do with what's wrong - but googling it hasn't led to anything useful.

Any ideas what that error is talking about?

Solution 1:

xrandr is not used or supported by Wayland.

If you can, log in using xorg instead of Wayland. Hopefully, this is still an option.