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Last active December 22, 2019 01:52
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HP Intel laptop screen backlight control when xbacklight doesn't work
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config
# i3 config
bindsym XF86MonBrightnessUp exec /home/tbrown/bin/undim # increase screen brightness
bindsym XF86MonBrightnessDown exec /home/tbrown/bin/dim # decrease screen brightness
# /home/tbrown/bin/undim
LVL=$(cat /sys/class/backlight/intel_backlight/brightness)
LVL=$(((LVL+20)%648))
echo $LVL >/sys/class/backlight/intel_backlight/brightness
# dim as above but -20
# check /sys/class/backlight/intel_backlight/max_brightness for % term
# sudo chown a+rw /sys/class/backlight/intel_backlight/brightness
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