一、调节屏幕亮度（资料来源：http://itsfoss.com/fix-brightness-ubuntu-1310/）
下面英文的意思大致就是在/usr/share/X11/xorg.conf.d/ 创建一个文档 20-intel.conf，并写入下面提示的代码
Open a terminal and create the following configuration file, if it does not exist:
$ sudo touch /usr/share/X11/xorg.conf.d/20-intel.conf
Now we need to edit this file. You can use any editor be it a terminal one or graphical.
$ sudo gedit /usr/share/X11/xorg.conf.d/20-intel.conf
Add the following lines to this file:
Section "Device"
Identifier "card0"
Driver "intel"
Option "Backlight" "intel_backlight"
BusID "PCI:0:2:0"
EndSection
Save it. Log out and log in back. The brightness control should be working through function keys now:
