Brightness

Xrandr

• grep monitor :

xrandr -q |grep connected

eDP1 connected primary 1280x800+0+0 (normal left inverted right x axis y axis) 217mm x 135mm
DP1 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)

• change from 0 to 1

xrandr --output eDPy --brightness 0.5

Backlight brightness

• use cli to change to 50%

$ xbacklight -set 50

• use echo to /sys/.../file

# sudo chown $USER:$video /sys/class/backlight/*/actual_brightness
# sudo chmod 0664 /sys/class/backlight/*/actual_brightness
# echo 937 | sudo tee /sys/class/backlight/*/actual_brightness

screen saver

use 300 seconde to go to screen saver

xset s 300

fix i3status-rs

we should use elogind that provide an service for dbus like systemd that help to adjust the backlight.

xbps-install -y elogind
sudo ln -s /etc/sv/elogind/ /var/service

then logout or reboot.