Touchpad freezes frequently

[Ahmad Raafat El-Komey]

After a few seconds, a couple minutes tops, from starting up the machine, the touchpad freezes and I can no longer control the mouse pointer unless I have a mouse connected.

How I thought this is a bug?
I couldn't find the touchpad in the file: /proc/bus/input/devices. Source: https://wiki.ubuntu.com/DebuggingTouchpadDetection#In_case_your_Touchpad_doesn.27t_work_at_all_.28No_response_from_the_Touchpad.29

I'm running Ubuntu 18.04.6 LTS on DELL Latitude 5591.

A side note: I have been using this machine for around 2 years. This wasn't the case when I first had Ubuntu installed. Rather, this issue surfaced like a year ago or so.

Disabling the touchpad from xinput --disable and re-enabling it doesn't fix it.
Restarting the driver: modprobe -r psmouse doesn't fix it either.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-5.4.0-87-generic 5.4.0-87.98~18.04.1
ProcVersionSignature: Ubuntu 5.4.0-87.98~18.04.1-generic 5.4.140
Uname: Linux 5.4.0-87-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.26
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Tue Oct 19 09:38:45 2021
InstallationDate: Installed on 2019-10-21 (728 days ago)
InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
SourcePackage: linux-signed-hwe-5.4
UpgradeStatus: No upgrade log present (probably fresh install)