package nvidia-340 (not installed) failed to install/upgrade: trying to overwrite '/usr/lib/x86_64-linux-gnu/libnvidia-ml.so', which is also in package libnvidia-compute-390:amd64 390.77-0ubuntu0.18.04.1

[Etienne]

First of all, I installer the nvidia driver via this following repo: sudo add-apt-repository ppa:graphics-drivers/ppa

Then I got the error message attached in this report when I tried to install nvidia-cuda-toolkit.

So I tried to uninstall all nvidia:
sudo add-apt-repository --remove ppa:graphics-drivers/ppa
sudo apt update
ubuntu-drivers devices
Then I install the nvidia driver from the official repo of ubuntu like described in https://doc.ubuntu-fr.org/nvidia chapter 3.1.
Then I tried to install nvidia-cuda-toolkit again but I faced the same issue.

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: nvidia-340 (not installed)
ProcVersionSignature: Ubuntu 4.15.0-42.45-generic 4.15.18
Uname: Linux 4.15.0-42-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia
ApportVersion: 2.20.9-0ubuntu7.5
AptOrdering:
 nvidia-340:amd64: Install
 NULL: ConfigurePending
Architecture: amd64
Date: Mon Dec 10 12:45:12 2018
DuplicateSignature:
 package:nvidia-340:(not installed)
 Unpacking nvidia-340 (340.107-0ubuntu0.18.04.1) ...
 dpkg: error processing archive /var/cache/apt/archives/nvidia-340_340.107-0ubuntu0.18.04.1_amd64.deb (--unpack):
  trying to overwrite '/usr/lib/x86_64-linux-gnu/libnvidia-ml.so', which is also in package libnvidia-compute-390:amd64 390.77-0ubuntu0.18.04.1
ErrorMessage: trying to overwrite '/usr/lib/x86_64-linux-gnu/libnvidia-ml.so', which is also in package libnvidia-compute-390:amd64 390.77-0ubuntu0.18.04.1
InstallationDate: Installed on 2018-12-06 (3 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
Python3Details: /usr/bin/python3.6, Python 3.6.7, python3-minimal, 3.6.7-1~18.04
PythonDetails: N/A
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2.1
 apt 1.6.6
SourcePackage: nvidia-graphics-drivers-340
Title: package nvidia-340 (not installed) failed to install/upgrade: trying to overwrite '/usr/lib/x86_64-linux-gnu/libnvidia-ml.so', which is also in package libnvidia-compute-390:amd64 390.77-0ubuntu0.18.04.1
UpgradeStatus: No upgrade log present (probably fresh install)

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Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #1798721, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.