ubuntu14 下调整显示器亮度(change the brightness of your screen in ubuntu14)

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refer to :http://itsfoss.com/fix-brightness-ubuntu-1310/

安装完ubuntu14后发现屏幕亮度无法调节?别怕,这是一个已知的bug(只要你的是 intel的显卡,就肯定会出现这个问题)

1. 确定你用的是intel 显卡:  

$ ls /sys/class/backlight ,

intel-backlight 

2. $ 新增文件:  

$ sudo touch /usr/share/X11/xorg.conf.d/20-intel.conf
$ sudo vim /usr/share/X11/xorg.conf.d/20-intel.conf

内容为:

Section "Device"
    Identifier "card0"
    Driver "intel"
    Option "Backlight" "intel_backlight"
    BusID "PCI:0:2:0"EndSection

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