$ cat /tmp/cuda_install_1976.log

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.





Welcome to the NVIDIA Software Installer for Unix/Linux



Detected 24 CPUs online; setting concurrency level to 24.

The file '/tmp/.X0-lock' exists and appears to contain the process ID

'1473' of a runnning X server.

It appears that an X server is running. Please exit X before installation. If you're sure that X is not running, but are getting this error, please delete any X lock files in /tmp.

===========
= Summary =
===========

Driver:   Installation Failed
Toolkit:  Installation skipped
Samples:  Installation skipped


Logfile is /tmp/cuda_install_1976.log