Touchpad doesn't work in 'Ideapad 5 14ALC05' after OS installation restart.

[Antti Aku-Petteri Tuorila]

Started Ubuntu 20.04.2 LTS installation right after receiving my new 'Lenovo Ideapad 5 14ALC05'.
Everything worked fine during installation.
However, after the installations restart, touchpad doesn't work at all.
Keyboard and other peripherals like wireless mouse work fine.
Running 'cat /proc/bus/input/devices' and 'xinput' it seems that the touchpad isn't recognized.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.8.0-55-generic 5.8.0-55.62~20.04.1
ProcVersionSignature: Ubuntu 5.8.0-55.62~20.04.1-generic 5.8.18
Uname: Linux 5.8.0-55-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.18
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Tue Jun 8 19:40:27 2021
InstallationDate: Installed on 2021-06-08 (0 days ago)
InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 (20210209.1)
SourcePackage: linux-signed-hwe-5.8
UpgradeStatus: No upgrade log present (probably fresh install)

[koba (kobako)]

@Antti,
Would you please try this
#sudo apt install linux-image-5.10.0-1029-oem
#reboot

[Antti Aku-Petteri Tuorila (anaannaanaa)]

Tried the above.
Had no effect. Still doesn't recognize the touchpad.

[koba (kobako)]

@Antti, can you upload dmesg? thanks

[Antti Aku-Petteri Tuorila (anaannaanaa)]

Yes, no problem.
Added attachment of 'dmesg' output.

[koba (kobako)]

@Antti, can you try mainline kernel and also provide dmesg?
Download deb files from AMD64,
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.13-rc5/

[Antti Aku-Petteri Tuorila (anaannaanaa)]

@koba
I just started my laptop and the touchpad suddenly has started working now!?
It is also recognized in devices.
I didn't try your latest suggestion yet.
Should I upload something for future troubleshooting?

[William Snider (bigdawg123)]

I am having the same problem. I did step 1. Did not work.