在 Ubuntu 15.10 中自动降低电池亮度？

Question 1

介绍

下面的脚本使用dbusshellon_ac_power脚本（Ubuntu 默认自带）来轮询交流适配器是否存在，并根据$HOME/.auto-backlightrc文件中设置的值设置亮度。

安装

git通过终端安装：

运行sudo apt-get install git安装git
运行。如果已存在，mkdir $HOME/bin则跳过此步骤$HOME/bin
cd $HOME/bin
跑步git clone https://github.com/SergKolo/sergrep.git
该脚本将位于$HOME/bin/sergrep/auto-backlight.sh。确保脚本可以使用chmod +x $HOME/bin/sergrep/auto-backlight.sh
将脚本添加为启动应用程序。在 Unity Dash 或 Gnome 搜索中查找启动应用程序菜单。或者，gnome-session-properties在终端中运行命令以启动菜单。将脚本的完整路径添加为启动应用程序，以便每次登录 GUI 时都会启动它。

或者，您可以自行复制并保存脚本源，chmod +x file并执行上面描述的步骤#6。

要使脚本在每次登录 Gnome 或 Unity 时自动启动，请使用启动应用程序公用事业。

笔记：如果您希望脚本始终设置 AC 亮度，请取消注释第 60 行和第 61 行的 else 语句，特别是这一部分

 # The two lines bellow are optional for 
 # setting brightness if on AC. remove # 
 # if you want to use these two

 # else 
       # change_brightness $INCREASE

脚本源

#!/usr/bin/env bash
#
###########################################################
# Author: Serg Kolo , contact: [email protected] 
# Date: February 26 2016 
# Purpose: Brightness control that polls for
#          ac adapter presence. Uses
# Dependencies: on_ac_power script, dbus, Unity/Gnome 
# Written for: https://askubuntu.com/q/739617/295286
# Tested on: Ubuntu 14.04 LTS
###########################################################
# Copyright: Serg Kolo , 2016
#    
#     Permission to use, copy, modify, and distribute this software is hereby granted
#     without fee, provided that  the copyright notice above and this permission statement
#     appear in all copies.
#
#     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
#     IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
#     THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
#     LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
#     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
#     DEALINGS IN THE SOFTWARE.

# uncomment the line bellow for debugging
#set -x

ARGV0="$0"
ARGC=$#


main()
{

  # defaults
  local DISPLAY=:0
  local DECREASE=30
  local INCREASE=75
  local RCFILE="$HOME/.auto-backlightrc"
  #---

  # Check the settings
  if [ -f $RCFILE ]
  then 
       source $RCFILE 
  else
       create_rcfile $DECREASE $INCREASE
  fi
  #---

  # now actually test if we're using ac adapter
  if ! on_ac_power 
  then 
        change_brightness $DECREASE
  # The two lines bellow are optional for 
  # setting brightness if on AC. remove # 
  # if you want to use these two

  # else 
       # change_brightness $INCREASE
  fi

}

change_brightness()
{
  dbus-send --session --print-reply\
    --dest=org.gnome.SettingsDaemon.Power\
    /org/gnome/SettingsDaemon/Power \
    org.gnome.SettingsDaemon.Power.Screen.SetPercentage uint32:"$1"
}

create_rcfile()
{
  echo "DECREASE="$1 >  "$RCFILE"
  echo "INCREASE="$2 >> "$RCFILE"
}


while true
do
   main
   sleep 0.25
done

Answer

介绍