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48 lines
1.5 KiB
Bash
48 lines
1.5 KiB
Bash
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#!/bin/bash
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current=`xbacklight -get`
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# alternatively, if xbacklight does not work:
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# current=`qdbus org.gnome.SettingsDaemon.Power /org/gnome/SettingsDaemon/Power org.gnome.SettingsDaemon.Power.Screen.GetPercentage`
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scale="1 2 5 10 20 50 100"
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case $1 in
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"down")
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# translate space to newline so tac will reverse order of lines (values)
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for val in $(tr ' ' '\n' <<< $scale | tac) ; do
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# scale = 3 to preserve some decimal values
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if (( $(bc <<< "scale=3 ; $val < $current/1.1") )) ; then
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newval=$val
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break
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fi
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done
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;;
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"up")
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for val in $scale ; do
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# scale = 3 to preserve some decimal values
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if (( $(bc <<< "scale=3 ; $val > $current*1.1") )) ; then
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newval=$val
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break
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fi
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done
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;;
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*)
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echo "Usage: $0 [up, down]"
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exit 1
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esac
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if [ "x$newval" == "x" ] ; then
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echo "Already at min/max."
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else
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echo "Setting backlight to $newval."
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# thanks: https://bbs.archlinux.org/viewtopic.php?pid=981217#p981217
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notify-send " " -i notification-display-brightness-low -h int:value:$newval -h string:x-canonical-private-synchronous:brightness &
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xbacklight -set $newval -steps 1 -time 0
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# alternatively, if xbacklight does not work:
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# qdbus org.gnome.SettingsDaemon.Power /org/gnome/SettingsDaemon/Power org.gnome.SettingsDaemon.Power.Screen.SetPercentage $newval
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fi
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exit 0
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