touchpad not detected acer A317-33

[Yves Guilloux]

My touchpad is not detected and doesn't appear on the 'xinput list'.

The solution presented here https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1668106/comments/2

doesn't work : in my Bios, the option Touchpad doesn't exist

$ inxi -M
Machine:
  Type: Laptop System: Acer product: Aspire A317-33 v: V1.02
  serial: <superuser/root required>
  Mobo: JSL model: Lilac_JL v: V1.02 serial: <superuser/root required>
  UEFI: Insyde v: 1.02 date: 12/30/2020

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.8.0-48-generic 5.8.0-48.54~20.04.1
ProcVersionSignature: Ubuntu 5.8.0-48.54~20.04.1-generic 5.8.18
Uname: Linux 5.8.0-48-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.16
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Sun Apr 4 15:55:43 2021
InstallationDate: Installed on 2021-04-04 (0 days ago)
InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 (20210209.1)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: linux-signed-hwe-5.8
UpgradeStatus: No upgrade log present (probably fresh install)