touchpad not working and not found in /proc/bus/input/devices

[filippo]

I installed Ubuntu 20.04.3 on a Fujitsu Lifeboob U7510, and the touchpad s not working: it is also not present in the file /proc/bus/input/devices, and seems not to be detected by the system.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.11.0-27-generic 5.11.0-27.29~20.04.1
ProcVersionSignature: Ubuntu 5.11.0-27.29~20.04.1-generic 5.11.22
Uname: Linux 5.11.0-27-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.18
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Thu Aug 26 15:56:01 2021
InstallationDate: Installed on 2021-08-26 (0 days ago)
InstallationMedia: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819)
SourcePackage: linux-signed-hwe-5.11
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Miratunnisa Umarputri (ratuuaw)]

I have the same problem. I cannot detect touchpad in /proc/input/devices. My laptop is Lenovo LIdeaPad 3