Problem: ubunbu安装nvidia显卡驱动后黑屏

导致黑屏原因： 

运行完如下命令后，系统就呵呵了

sudo add-apt-repository ppa:xorg-edgers/ppa
sudo apt-get update
sudo apt-get dist-upgrade
sudo apt-get install nvidia-current

Solution ：from http://askubuntu.com/questions/41681/blank-screen-after-installing-nvidia-restricted-driver

Remove everything to do with the Nvidia proprietary drivers.

sudo nvidia-settings --uninstall
sudo apt-get remove --purge nvidia* 

Start from scratch.

sudo apt-get remove --purge xserver-xorg-video-nouveau xserver-xorg-video-nv 

Reinstall all the things!

sudo apt-get install nvidia-common
sudo apt-get install xserver-xorg-video-nouveau
sudo apt-get install --reinstall libgl1-mesa-glx libgl1-mesa-dri xserver-xorg-core

Reconfigure the X server.

sudo dpkg-reconfigure xserver-xorg