X-Git-Url: https://plomlompom.com/repos/?a=blobdiff_plain;f=bin%2Fw530_backlight.sh;fp=bin%2Fw530_backlight.sh;h=bce6b30039f635fec143094f071af741f11e986b;hb=e2ec6208875a1f54b438b3495a1374a0d304d3ee;hp=0000000000000000000000000000000000000000;hpb=c5438baf5d0f7dbdbf7c172a218a5b1bbdea6f84;p=config

diff --git a/bin/w530_backlight.sh b/bin/w530_backlight.sh
new file mode 100755
index 0000000..bce6b30
--- /dev/null
+++ b/bin/w530_backlight.sh
@@ -0,0 +1,17 @@
+#!/bin/sh
+# A very primitive backlight setter with a hardcoded backlight path, to replace
+# xbacklight which currently does not work on my system.
+if ! echo "${1}" | egrep -q '^[0-9]+$'; then
+  echo 'Argument must be a number.'
+  exit 1
+fi
+percentage=${1}
+backlight_dir=/sys/class/backlight/intel_backlight
+max_brightness=$(cat "${backlight_dir}"/max_brightness)
+if [ "${percentage}" = '100' ]; then
+  sudo sh -c 'echo '"${max_brightness}"' > '"${backlight_dir}"'/brightness'
+else
+  fract=$(expr "${max_brightness}" / 100)
+  brightness=$(expr "${percentage}" \* "${fract}")
+  sudo sh -c 'echo '"${brightness}"' > '"${backlight_dir}"'/brightness'
+fi