CUDA 7.5 installation steps

0) Download your relevant file: mine was: Note, that once again this install is if you purely want to use your graphics card (Titan X) for GPU/CUDA purposes and not for rendering.

Also run: $sudo apt-get install build-essential

1) I start off with the regular GUI and Ubuntu working with no login problems. 2) No need to create an xorg.conf file. If you have one, remove it (assuming you ahve a fresh OS install). $ sudo rm /etc/X11/xorg.conf

3) Create the /etc/modprobe.d/blacklist-nouveau.conf file with : blacklist nouveau option nouveau modeset=0

Then $sudo update-initramfs -u

4) Reboot computer. Nothing should have changed in loading up menu. You should be taken to the login screen. Once there type: Ctrl + Alt + F1, and login to your user. 5) Go to the directory where you have the CUDA driver, and run $chmod a+x . 7) Now, run $ sudo service lightdm stop The top line is a necessary step for installing the driver. 8) I run the CUDA driver run file. *Notice that I explicitly don't want the OpenGL flags to be installed: $ sudo bash –no-opengl-libs

9) During the install: Accept EULA conditions Say YES to installing the NVIDIA driver SAY YES to installing CUDA Toolkit + Driver Say YES to installing CUDA Samples

Say NO rebuilding any Xserver configurations with Nvidia.

10) Installation should be complete. Now check if device nodes are present: Check if /dev/nvidia* files exist. If they don't, do : $ sudo modprobe nvidia

11) Set Environment path variables: $ export PATH=/usr/local/cuda-7.0/bin:$PATH $ export LD_LIBRARY_PATH=/usr/local/cuda-7.0/lib64:$LD_LIBRARY_PATH

*Change depending on your cuda version.

12) Verify the driver version: $ cat /proc/driver/nvidia/version

13) Check CUDA driver version: $ nvcc -V

[Optional] At this point you can switch the lightdm back on again by doing: $ sudo service lightdm start.

You should be able to login to your session through the GUI without any problems or login-loops.

14) Create CUDA Samples. Go to your NVIDIA_CUDA-7.5_Samples folder and type $make.

15) Go to NVIDIA_CUDA-7.5_Samples/bin/x86_64/linux/release/ for the demos, and do the two standard checks: ./deviceQuery to see your graphics card specs and ./bandwidthTest to check if its operating correctly.

Both tests should ultimately output a 'PASS' in your terminal.

16) Reboot. Everything should be ok.