le pavé tactile ne marche pas

Aprés avoir installer ubuntu en dual avec windows le pavé tactile ne marche pas !

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-5.0.0-29-generic 5.0.0-29.31~18.04.1
ProcVersionSignature: Ubuntu 5.0.0-29.31~18.04.1-generic 5.0.21
Uname: Linux 5.0.0-29-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.7
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Wed Sep 25 15:35:25 2019
InstallationDate: Installed on 2019-09-24 (0 days ago)
InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: linux-signed-hwe
UpgradeStatus: No upgrade log present (probably fresh install)