package nvidia-340 (not installed) failed to install/upgrade: tentative de remplacement de « /lib/udev/rules.d/71-nvidia.rules », qui appartient aussi au paquet nvidia-kernel-common-390 390.132-0ubuntu2

[abbes]

I applied modification in xserver nvidia panel:
video settings: quality to high performances.
I saved new configuration.
.conf file has been updated
after reboot no connexion with Xserver, graphical issue.
I booted in recovery mode : connect to internet network, used root way
to replace video drivers nvidia by video drivers xserver-xorg-driver-nouveau
Graphical Ubuntu mode is back now.

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: nvidia-340 (not installed)
ProcVersionSignature: Ubuntu 5.4.0-24.28-generic 5.4.30
Uname: Linux 5.4.0-24-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
Date: Sun Apr 19 03:48:29 2020
ErrorMessage: tentative de remplacement de « /lib/udev/rules.d/71-nvidia.rules », qui appartient aussi au paquet nvidia-kernel-common-390 390.132-0ubuntu2
InstallationDate: Installed on 2018-11-16 (519 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
Python3Details: /usr/bin/python3.8, Python 3.8.2, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: /usr/bin/python2.7, Python 2.7.18rc1, python-is-python2, 2.7.17-4
RelatedPackageVersions:
 dpkg 1.19.7ubuntu3
 apt 2.0.2
SourcePackage: nvidia-graphics-drivers-340
Title: package nvidia-340 (not installed) failed to install/upgrade: tentative de remplacement de « /lib/udev/rules.d/71-nvidia.rules », qui appartient aussi au paquet nvidia-kernel-common-390 390.132-0ubuntu2
UpgradeStatus: No upgrade log present (probably fresh install)