jcs.org
Control intel backlight on FreeBSD (and OpenBSD)
openbsd
1#!/bin/sh
2
3update_brightness()
4(
5 BRIGHTNESS=$(( `sysctl -n dev.isl.0.ir` / 10 ))
6 if [ $BRIGHTNESS -lt 10 ]; then
7 BRIGHTNESS=10
8 fi
9 if [ $BRIGHTNESS -gt 100 ]; then
10 BRIGHTNESS=100
11 fi
12 return $BRIGHTNESS
13)
14
15update_brightness
16LAST=$?
17intel_backlight $LAST >/dev/null
18
19while sleep 1; do
20 update_brightness
21 NEW=$?
22 if [ $LAST -gt $NEW ]; then
23 DIFF=$(( $LAST - $NEW ))
24 if [ $DIFF -gt 4 ]; then
25 while [ $LAST -gt $NEW ]; do
26 LAST=$(( LAST - 2 ))
27 intel_backlight $LAST >/dev/null
28 sleep 0.01
29 done
30 fi
31 else
32 DIFF=$(( $NEW - $LAST ))
33 if [ $DIFF -gt 4 ]; then
34 while [ $LAST -lt $NEW ]; do
35 LAST=$(( LAST + 2 ))
36 intel_backlight $LAST >/dev/null
37 sleep 0.01
38 done
39 fi
40 fi
41done