jcs.org
Control intel backlight on FreeBSD (and OpenBSD)
openbsd
Include example script to auto adjust brightness when using isl
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README
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README
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$ intel_backlight decr
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current backlight value: 60% (562/937)
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set backlight to 51% (478/937)
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The included example allows adjusting brightness automatically based on the
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input of the isl driver (currently not part of standard FreeBSD).
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Usage:
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./isl_backlight.sh &
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isl_backlight.sh
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isl_backlight.sh
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#!/bin/sh
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update_brightness()
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(
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BRIGHTNESS=$(( `sysctl -n dev.isl.0.ir` / 10 ))
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if [ $BRIGHTNESS -lt 10 ]; then
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BRIGHTNESS=10
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fi
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if [ $BRIGHTNESS -gt 100 ]; then
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BRIGHTNESS=100
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fi
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return $BRIGHTNESS
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)
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update_brightness
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LAST=$?
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intel_backlight $LAST >/dev/null
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while sleep 1; do
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update_brightness
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NEW=$?
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if [ $LAST -gt $NEW ]; then
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DIFF=$(( $LAST - $NEW ))
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if [ $DIFF -gt 4 ]; then
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while [ $LAST -gt $NEW ]; do
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LAST=$(( LAST - 2 ))
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intel_backlight $LAST >/dev/null
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sleep 0.01
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done
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fi
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else
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DIFF=$(( $NEW - $LAST ))
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if [ $DIFF -gt 4 ]; then
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while [ $LAST -lt $NEW ]; do
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LAST=$(( LAST + 2 ))
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intel_backlight $LAST >/dev/null
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sleep 0.01
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done
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fi
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fi
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done