How can I set a certain temperature on Redshift?
You can permanently set the color temperature from the command line:
Open (gnome-
) terminal
, type the command:
redshift -O <temperature>
and press Return
To set it to (e.g.) 3700:
redshift -O 3700
To reset to "neutral":
redshift -x
See for more (command line) options:
man redshift
(Given the fact that Redshift is installed :))
If you use redshift-gtk
then @Jacob's method will not work.
You need to create a configuration file in your $HOME/.config
directory to change it's settings. Sample configuration file creation described in it's official page, quoted below:
A configuration file can be created, but the documentation is a bit sparse. You’ll have to create it manually and put it in ~/.config/redshift.conf. The following is an example of a configuration file:
; Global settings for redshift [redshift] ; Set the day and night screen temperatures temp-day=5700 temp-night=3500 ; Enable/Disable a smooth transition between day and night ; 0 will cause a direct change from day to night screen temperature. ; 1 will gradually increase or decrease the screen temperature. transition=1 ; Set the screen brightness. Default is 1.0. ;brightness=0.9 ; It is also possible to use different settings for day and night ; since version 1.8. ;brightness-day=0.7 ;brightness-night=0.4 ; Set the screen gamma (for all colors, or each color channel ; individually) gamma=0.8 ;gamma=0.8:0.7:0.8 ; This can also be set individually for day and night since ; version 1.10. ;gamma-day=0.8:0.7:0.8 ;gamma-night=0.6 ; Set the location-provider: 'geoclue', 'geoclue2', 'manual' ; type 'redshift -l list' to see possible values. ; The location provider settings are in a different section. location-provider=manual ; Set the adjustment-method: 'randr', 'vidmode' ; type 'redshift -m list' to see all possible values. ; 'randr' is the preferred method, 'vidmode' is an older API. ; but works in some cases when 'randr' does not. ; The adjustment method settings are in a different section. adjustment-method=randr ; Configuration of the location-provider: ; type 'redshift -l PROVIDER:help' to see the settings. ; ex: 'redshift -l manual:help' ; Keep in mind that longitudes west of Greenwich (e.g. the Americas) ; are negative numbers. [manual] lat=48.1 lon=11.6 ; Configuration of the adjustment-method ; type 'redshift -m METHOD:help' to see the settings. ; ex: 'redshift -m randr:help' ; In this example, randr is configured to adjust screen 1. ; Note that the numbering starts from 0, so this is actually the ; second screen. If this option is not specified, Redshift will try ; to adjust _all_ screens. [randr] screen=1
Another sample configuration also found at Ubuntu Documentation.
For those who are looking for answer to this question
"When I type redshift -O
for example, it works for about a second, then goes back to normal... What should I do in this situation? "
Try - Go to the top of your screen -> The redshift icon -> Click on Enable to disable it -> the go on terminal and type
redshift -O <Temperature>
Worked for me