Touchpad incorrectly detected as PS/2 Generic Mouse in Lenovo IdeaPad 100-14IBY

Lenovo IdeaPad 100-14IBY

The laptop is a friend's and I know that the touchpad worked in the beginning, and I assume it was a kernel update that broke it. She can't remember when exactly it stopped working, it did not work roughly since the beginning of february, she says.

I followed the instructions at https://wiki.ubuntu.com/DebuggingTouchpadDetection and attached the files mentioned there.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-4.2.0-34-generic 4.2.0-34.39~14.04.1
ProcVersionSignature: Ubuntu 4.2.0-34.39~14.04.1-generic 4.2.8-ckt4
Uname: Linux 4.2.0-34-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
CurrentDesktop: Unity
Date: Mon Mar 21 10:02:39 2016
InstallationDate: Installed on 2016-03-20 (0 days ago)
InstallationMedia: Ubuntu 14.04.4 LTS "Trusty Tahr" - Release amd64 (20160217.1)
SourcePackage: linux-lts-wily
UpgradeStatus: No upgrade log present (probably fresh install)