Ubuntu 12.04 - Установка драйвера Nvidia Geforce 210 - & ldquo; Ошибка & rdquo; xserver работает

Я пытался обновить драйвер Nvidia, но получаю ошибки. Как я совсем новичок в Ubuntu.

Ниже приведен журнал установки:

Using: nvidia-installer ncurses user interface
-> The file '/tmp/.X0-lock' exists and appears to contain the process ID '1196' of a runnning X server.
ERROR: You appear to be running an X server; please exit X before installing.  For further details, 
please see the section INSTALLING THE NVIDIA DRIVER in the README available on the Linux driver download page at www.nvidia.com.
ERROR: Installation has failed.  Please see the file '/var/log/nvidia-installer.log' for details.  
You may find suggestions on fixing installation problems in the README available on the Linux driver download page at www.nvidia.com.