How to solve “unmet dependencies while installing CUDA-9-0 on Ubuntu 18.04”

Question

I am trying to install CUDA-9-0 on Ubuntu 18.04, but I get the following error when I run the command sudo apt install cuda

The following packages have unmet dependencies:
 cuda : Depends: cuda-9-0 (>= 9.0.176) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

I have nVidia-driver-390 properly installed installed. I try to install CUDA using .deb local file installation method as described on the website of nVidia Here

I use the .deb file for Ubuntu 17.04

Does anyone has an idea how to solve this?

Answer 1

I have solved the problem by removing the nVidia driver and reinstalling it. What I did is :

sudo apt purge nvidia*

and then re-installed it using:

sudo apt install nvidia-390

I am using ppa:graphics-drivers/ppa for nVidia drivers. The repo is added using:

sudo add-apt-repository ppa:graphics-drivers/ppa
sudo apt-get update

I don't know what was the reason, but as you see removing and re-installing solved the problem.