首先系统要安装好受限显卡驱动；安装gedit，修改xorg.conf：


sudo apt-get install gedit
sudo gedit /etc/X11/xorg.conf
加入红色的一行如下：
Section "Screen"
    Identifier    "Default Screen"
    DefaultDepth    24
EndSection

Section "Module"
    Load    "glx"
EndSection

Section "Device"
    Identifier    "Default Device"
    Driver    "nvidia"
    Option    "NoLogo"    "flase"
    Option "RegistryDwords" "EnableBrightnessControl=1"
EndSection