INFO_CUDA_INSTALLATION.txt

---------Cuda toolkit and nvidia drivers installation------------

1) If using a laptop, install bumblebee  (http://www.themukt.com/2014/06/13/howto-install-nvidia-331-bumblebee-optimus-cards-ubuntu/)

 	a) First and foremost, install the kernel header file. This header file will be required to recompile dkms package for the new Nvidia driver.

		$ sudo apt-get install linux-headers-generic

	b) Install bumblebee if you haven’t done already

		$ sudo add-apt-repository ppa:bumblebee/stable (This step might not ve neccesary in the newest versions of Ubuntu, since they seem to be avalable in the official repositories)
		Then
			$ sudo apt-get update && sudo apt-get install bumblebee bumblebee-nvidia primus
		or 
			open synaptic PM, reload repos and install packages

2) Install the last cuda toolkit (at the moment of writting this, cuda 7.5) (http://docs.nvidia.com/cuda/cuda-getting-started-guide-for-linux/#axzz39Xa49azk)
		$ sudo dpkg -i cuda-repo-<distro>_<version>_<architecture>.deb
		Then
			$ sudo apt-get update
			$ sudo apt-get install cuda
		or
			open synaptic PM, reload repos and install packages

	NOTE: when installing CUDA, PM will probably tell to remove nvidia-current and nvidia-some_number packages which were installed together with bumblebee package. It's OK removing them since cuda package includes updated drivers.

3) Environment setup and isntall samples
	$ export PATH=/usr/local/cuda-7.5/bin:$PATH
	$ export LD_LIBRARY_PATH=/usr/local/cuda-7.5/lib:$LD_LIBRARY_PATH
	$ cuda-install-samples-7.5.sh <dir>

4) Once installation is done, edit the bumblebee.conf using your favourite text editor. Check which driver version (version_number) was installed with cuda toolkit (nvidia-352 for cuda 7.5).

	Open bumblebee config file
	  $ sudo vim /etc/bumblebee/bumblebee.conf

	In line no 22, set the following:
	  Driver=nvidia

	You will also need to specify which nvidia driver to use in line no 55:
	  KernelDriver=nvidia-version_number

	Change the following in line no 58:
	  LibraryPath=/usr/lib/nvidia-version_number:/usr/lib32/nvidia-version_number

	And in line no 61 :
	  XorgModulePath=/usr/lib/nvidia-version_number/xorg,/usr/lib/xorg/modules

	Reinstall bbswitch-dkms
	 $sudo apt-get install --reinstall bbswitch-dkms

	Reboot

Edit the file /etc/modprobe.d/bumblebee.conf or create a new file if you are not using bumblebee and add a line to it:

alias nvidia-uvm nvidia-version_number-uvm