由于ubuntu的驅(qū)動問題亏娜，筆記本上的亮度調(diào)節(jié)快捷鍵基本上用不了拭宁，所以我寫了個腳本來調(diào)節(jié)亮度聚假，然后把腳本映射到自定義快捷鍵上
原理
控制亮度文件的文件在
/sys/class/backlight/intel_backlight/brightness里面
$ cd /sys/class/backlight/intel_backlight
$ ls
actual_brightness brightness max_brightness subsystem uevent
bl_power device power type
$ cat brightness
287
$ cat max_brightness
937
brightness里面保存的是當(dāng)前亮度
max_brightness里面保存的是亮度最大值
所以直接修改brightness的值就可以調(diào)節(jié)亮度了
開始操作
首先修改brightness的權(quán)限
sudo chmod 777 /sys/class/backlight/intel_backlight/brightness
然后可以執(zhí)行命令測試是否能調(diào)節(jié)亮度
調(diào)節(jié)亮度為100
echo 100 > /sys/class/backlight/intel_backlight/brightnes
調(diào)節(jié)亮度為0
echo 0 > /sys/class/backlight/intel_backlight/brightnes
如果成功了就可以開始寫腳本了
亮度增加 ：brightness_up.sh
#password里面填你的密碼
if [ ! -w /sys/class/backlight/intel_backlight/brightness ];then
echo "password" | sudo -S chmod 777 /sys/class/backlight/intel_backlight/brightness
fi
read bright < '/sys/class/backlight/intel_backlight/brightness'
v=0
v=$((30 + $bright))
if [ $v -gt 937 ]; then
v=937
# 937為我的最大亮度碌廓，即max_brightness文件里面的值
fi
echo $v > /sys/class/backlight/intel_backlight/brightness
亮度降低 ：brightness_down.sh
if [ ! -w /sys/class/backlight/intel_backlight/brightness ];then
echo "password" | sudo -S chmod 777 /sys/class/backlight/intel_backlight/brightness
fi
：
read bright < '/sys/class/backlight/intel_backlight/brightness'
v=0
v=$(($bright - 30 ))
echo $v > /sys/class/backlight/intel_backlight/brightness
后面的就比較簡單了，直接在設(shè)置里面配置快捷鍵背传，然后把對應(yīng)的命令寫進去呆瞻，比如ubuntu在設(shè)置-keyboard快捷鍵的command里面填
sh ..../brightness_up.sh
