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--- laptop_hacks [2018/10/25 15:52] – [Power Disconnect/Connect events] admin
+++ laptop_hacks [2020/02/08 16:40] – [Power Disconnect/Connect events] admin
@@ Line 238: / Line 238: @@
 and run ''systemctl enable bhepple-resume.service''
+brightness is this:
+  #!/bin/bash
+  # since xbacklight isn't working (nouveau?)
+  # https://bbs.archlinux.org/viewtopic.php?id=134972 and modified:
+  # needs to be run as root
+  NEW_VALUE=${1:-0}
+  # base dir for backlight class
+  basedir="/sys/class/backlight/"
+  # get the backlight handler
+  handler=$basedir$(ls $basedir |head -n 1)"/"
+  # get current brightness
+  old_brightness=$(cat $handler"brightness")
+  # get max brightness
+  max_brightness=$(cat $handler"max_brightness")
+  # get current brightness %
+  old_brightness_p=$(( 100 * $old_brightness / $max_brightness ))
+  # calculate new brightness %
+  if [[ $NEW_VALUE == [+-]* ]]; then
+      new_brightness_p=$(($old_brightness_p + $NEW_VALUE))
+  else
+      new_brightness_p=$NEW_VALUE
+  fi
+  # calculate new brightness value
+  new_brightness=$(( $max_brightness * $new_brightness_p / 100 ))
+  (( new_brightness <= max_brightness && new_brightness >= 0 )) && {
+      # set the new brightness value
+      echo $new_brightness > $handler"brightness"
+  }
 ====Disable nouveau====