To reduce these eyesight and sleeping problems, operating systems for laptops, desktops and mobile devices now have options to reduce the blue light and also schedule this for the most important moments of the day, namely when it is getting darker. Redshift controls the scheduling of the color temperature In this article I explain how to change default color temperature values of Redshift at startup. Linux Mint uses a simple but effective application called Redshift to prevent such effects, but the GUI does not allow you to set the values as you want. At the very least, it can lead to excessive fatigue due to disturbed sleeping patterns caused by adversely affected melatonin production (a hormone that regulates sleep and wakefulness), but researchers are also afraid of far-reaching effects, such as macular degeneration, which is damaging the light-sensitive cells in the retina. Under certain circumstances and with long-term exposure there are some concerns about possible long-term effects on the health of your eyes. Displays of computers and mobile devices emit significant amounts of blue light. This can be enabled from the notification icon also.Lately we read and hear more and more about the dangers of looking too long at a screen that emits too much blue light in a dark environment. In command box enter ‘redshift-gtk’, provide other details and save. To start Redshift at startup open Session and Startup and go to ‘Application Autostart’ tab. Copy them and paste them in place of and. Search on Google to find the latitude and longitude of your location. type 'redshift -m METHOD:help' to see the settings set these values if you've set the location-provider to manual instead of geoclue type 'redshift -l PROVIDER:help' to see the settings The adjustment method settings are in a different section. but works in some cases when 'randr' does not. 'randr' is the preferred method, 'vidmode' is an older API type 'redshift -m list' to see all possible values Set the adjustment-method: 'randr', 'vidmode' The location provider settings are in a different section. type 'redshift -l list' to see possible values Set the location-provider: 'geoclue', 'gnome-clock', 'manual' Set the screen gamma (for all colors, or each color channel individually) It is also possible to use different settings for day and night since version 1.8. 1 will gradually increase or decrease the screen temperature 0 will cause a direct change from day to night screen temperature. Enable/Disable a smooth transition between day and night Set the day and night screen temperatures An example configuration file is show below. This can be changed easily by creating a nf file in /.config folder which is not created by default. Instead it’s more suitable to set the coordinates manually once. Initially Redshift relies on Geoclue to determine the location however it doesn’t work in most cases. There are many tweaks available however they are not necessary. Different color temperature can be set for day and night. This help your eyes hurt less due to long exposure to computer screen. It adjust the blue light emitting from laptop screen according the time of day. Redshift is blue light filter utility for Linux.
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