终端输入命令:
sudo gedit /etc/rc.local
在最后一行前面加一行代码:
echo 0 > /sys/class/backlight/acpi_video0/brightness
修改后代码如下:
#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will “exit 0″ on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.
echo 0 > /sys/class/backlight/acpi_video0/brightness
exit 0
其中echo 后面的值为0-10,对应为0到100%,如echo 5表示一半亮度,根据自己喜好输入即可。
保存后退出,重启就可以了。