Driver: Installation Failed You may find this error message while trying to set up the NVIDIA CUDA Toolkit in Ubuntu. I found it when I was installing the toolkit for ArrayFire [1] CUDA Toolkit Installation 1. Download the CUDA Toolkit in the link. 2. Extract the .run file in a location sudo sh cuda_5.0.35_linux_64_ubuntu11.10-1.run –extract <location> 3. Exit the X server (press Ctrl+Alt+F1) and stop the display manager by the following command. sudo stop lightdm 4. cd to the location and now there are run files named samples*, devdriver* and cudatoolkit*. 5. Install devdriver (*only if NVIDIA Driver is not installed) sudo sh devdriver_5.0_linux_64_304.54.run 6. Install cudatoolkit sudo sh cudatoolkit-5.0.35_linux_64_ubuntu11.10.run In the end, when it asks …