有没有办法在任何用户登录之前在 GDM 登录屏幕上激活夜灯，并使用管理员或根帐户配置的开始和结束时间？
/etc/gdm3/greeter.dconf-defaults...的内容
# These are the options for the greeter session that can be set
# through GSettings. Any GSettings setting that is used by the
# greeter session can be set here.
# Note that you must configure the path used by dconf to store the
# configuration, not the GSettings path.
# Theming options
# ===============
# - Change the GTK+ theme
[org/gnome/desktop/interface]
# gtk-theme='Adwaita'
# - Use another background
[org/gnome/desktop/background]
# picture-uri='file:///usr/share/themes/Adwaita/backgrounds/stripes.jpg'
# picture-options='zoom'
# - Or no background at all
[org/gnome/desktop/background]
# picture-options='none'
# primary-color='#000000'
# Login manager options
# =====================
[org/gnome/login-screen]
#logo='/usr/share/images/vendor-logos/logo-text-version-128.png'
# - Disable user list
# disable-user-list=true
# - Disable restart buttons
# disable-restart-buttons=true
# - Show a login welcome message
# banner-message-enable=true
# banner-message-text='Welcome'
# Automatic suspend
# =================
[org/gnome/settings-daemon/plugins/power]
# - Time inactive in seconds before suspending with AC power
# 1200=20 minutes, 0=never
# sleep-inactive-ac-timeout=1200
# - What to do after sleep-inactive-ac-timeout
# 'blank', 'suspend', 'shutdown', 'hibernate', 'interactive' or 'nothing'
# sleep-inactive-ac-type='suspend'
# - As above but when on battery
# sleep-inactive-battery-timeout=1200
# sleep-inactive-battery-type='suspend'
#NightLight
[org/gnome/settings-daemon/plugins/color]
night-light-enabled=true
night-light-schedule-from=23.0
night-light-schedule-to=6.0
答案1
该文件是不言自明的
/etc/gdm3/greeter.dconf-defaults
因此，在上述文件的末尾添加以下内容，根据您的意愿将值从和更改为。
#NightLight
[org/gnome/settings-daemon/plugins/color]
night-light-enabled=true
night-light-schedule-from=5.0
night-light-schedule-to=10.0
