Autostart not working with Kubuntu 16.04

[damien-git]

Using Plasmoid 1.0.18, Kubuntu 16.04, KDE Plasma 5.8.7, KDE Frameworks 5.36.0, Qt 5.6.1.

Redshift works fine when I click on the plasmoid, but it never starts automatically despite the autostart option being checked. I tried reinstalling, reapplying the autostart option, but it does not change anything.

I see the following in .xsession-errors, which shows it tries to start but maybe it's killing the process right afterwards:

qml: disabling redshift
qml: renderModeString: 
qml: disabling redshift
[...]
qml: clearing connected sources, stop source was: killall redshift; redshift -x
qml: enabling redshift with command: redshift -l [coordinates] -t 6500:4000 -b 1:0.8 -g 1:1:1

[kotelnik]

That is weird... please check that there isn't another standalone redshift process started prior Plasma desktop (e.g. as an autostart application - System Settings -> Startup and Shutdown -> Autostart).

If this is not the issue, I'd try to start a clean Plasma session (e.g. with another linux user with empty home folder) and test there to narrow down the issue.