Add Redshift to startup apps – Ubuntu/Mint
To fix this I ad to add the following command to the startup apps: redshift-gtk -l 42.02:24.29 -t 6300:3800 .
It is: redshift-gtk -l <lat>:<lng> -t <max_kelvins>:<min_kelvins>
With this command everything is working fine. I also installed redshift-gtk which is a graphical plugin which displays an icon in the menu bar.