Comment 2 for bug 1244880

Redshift itself does seem to work. Invoking it with the -v flag, shows output

$ redshift -v
Location: 52.349998, 4.920000
Brightness: 1.00
Gamma: 1.000, 1.000, 1.000
Using method `randr'.
Period: Daytime
Color temperature: 6500K
Period: Daytime
Color temperature: 6499K
Period: Daytime
Color temperature: 6499K
Period: Daytime
Color temperature: 6500K
Period: Daytime
Color temperature: 6500K
Period: Daytime
Color temperature: 6499K

Also, calling with the -O flag and a very low temp setting, shows that redshift is able to change settings.

$ redshift -v -O 3500K
Brightness: 1.00
Gamma: 1.000, 1.000, 1.000
Using method `randr'.
Color temperature: 3500K

(Same holds for invoking gtk-redshift)