2019-01-18 One Minute of White

I have a weird Gnome (on PureOS) problem: I’ve set it to switch to warm colors for the night. I must have done it twice, because – if I remember correctly – I switch on the laptop in the evening and the colours are warm, but for one minute, from 20:00 to 20:01 it switches back to a glaring white, and then it’s back to warm colours. How weird! It’s supposed to switch to warm colours at 20:00 but something else is setting it to warm colours an hour early, which then results in that sudden bright flash from 20:00 to 20:01.

Any ideas what might be the cause of this one minute of brightness?

Settings

@cagatayy suggested I reset the configuration, and use the command line...

alex@melanobombus:~$ gsettings list-recursively org.gnome.settings-daemon.plugins.color
org.gnome.settings-daemon.plugins.color night-light-schedule-automatic false
org.gnome.settings-daemon.plugins.color recalibrate-display-threshold uint32 0
org.gnome.settings-daemon.plugins.color night-light-last-coordinates (...)
org.gnome.settings-daemon.plugins.color night-light-enabled true
org.gnome.settings-daemon.plugins.color night-light-schedule-from 20.0
org.gnome.settings-daemon.plugins.color night-light-schedule-to 6.0
org.gnome.settings-daemon.plugins.color night-light-temperature uint32 4000
org.gnome.settings-daemon.plugins.color recalibrate-printer-threshold uint32 0

This looks good.

Let’s just fiddle with the settings in the GUI, first. Disable, enable. No change. Manual, Sunset to Sunrise... No idea. Let’s try automatic, for the moment.

Settings, again

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