Version du 29 mars 2020 à 21:52

RedShift

Modifie la température de la couleur de l'image de l'écran au cours de la journée.
Généralement les écrans sont réglés sur 6500 Kelvin (blanc neutre).
RedShift fait passer progressivement de 5500 K en journée à 3500 K la nuit.

pacman -S redshift

redshift-gtk

~/.config/redshift/redshift.conf

; Global settings for redshift
[redshift]
; Set the day and night screen temperatures
; default 6500/4500
temp-day=5000
temp-night=3400

; Disable the smooth fade between temperatures when Redshift starts and stops.
; 0 will cause an immediate change between screen temperatures.
; 1 will gradually apply the new screen temperature over a couple of seconds.
fade=1

; Solar elevation thresholds.
; By default, Redshift will use the current elevation of the sun to determine
; whether it is daytime, night or in transition (dawn/dusk). When the sun is
; above the degrees specified with elevation-high it is considered daytime and
; below elevation-low it is considered night.
;elevation-high=3
;elevation-low=-6

; Custom dawn/dusk intervals.
; Instead of using the solar elevation, the time intervals of dawn and dusk
; can be specified manually. The times must be specified as HH:MM in 24-hour
; format.
;dawn-time=6:00-7:45
;dusk-time=18:35-20:15

; 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: '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=46.20
lon=6.17

; 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 only screen 0.
; Note that the numbering starts from 0, so this is actually the first screen.
; If this option is not specified, Redshift will try to adjust _all_ screens.
;[randr]
;screen=0

Étalonner son écran avec le ColorHug2

Mise à jour du firmware

# installer colorhug-client
yaourt colorhug-client

# lancer le logiciel de mise à jour du firmware
colorhug-flash

Étalonnage avec DisplayCal

sudo pacman -S displaycal gnome-color-manager
# gnome-color-manager fix the error "Querying for profile … returned no result" when the profile is installed.

displaycal

Les profils sont générés dans ~/.local/share/DisplayCAL/storage

Installer le profil

Menu → Color → Add profile
Gimp: Edit → Preferences → Color Management → Try to use the system monitor profile

Écran BenQ GW2250HM

	Avec le ColorHug2	Autre
Red	95	100
Green	75	100
Blue	78	100
Brightness	50	20
Contrast	50	50
Sharpness	1	1
Gamma	3	4