Ubuntu-12.04桌面系统启动报错： The system is running in low-graphics mode

由于改变了/var目录下文件的属主，结果桌面系统崩溃了，启动都成问题


Click Okay and then select the option to get a terminal. (alternatively you can press ctr+alt+f1 to bring up another tty)

sudo chown lightdm:lightdm -R /var/lib/lightdm
sudo chown avahi-autoipd:avahi-autoipd -R /var/lib/avahi-autoipd
sudo chown colord:colord -R /var/lib/colord