Lenovo Ideapad S145 - Touchpad not recognized at all

[Niko]

Touchpad not working and does not show in /proc/bus/input/devices

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.4.0-24-generic 5.4.0-24.28
ProcVersionSignature: Ubuntu 5.4.0-24.28-generic 5.4.30
Uname: Linux 5.4.0-24-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: hockenberry 1405 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Sun Apr 19 18:55:43 2020
InstallationDate: Installed on 2020-04-14 (5 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200409)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 003: ID 046d:c542 Logitech, Inc. Wireless Receiver
 Bus 001 Device 002: ID 13d3:5a08 IMC Networks Integrated Camera
 Bus 001 Device 004: ID 8087:0aaa Intel Corp.
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: LENOVO 81W8
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-24-generic root=UUID=13de703e-a708-4fe2-a00d-136215c4176a ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-5.4.0-24-generic N/A
 linux-backports-modules-5.4.0-24-generic N/A
 linux-firmware 1.187
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/26/2019
dmi.bios.vendor: LENOVO
dmi.bios.version: DKCN24WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40700 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo IdeaPad S145-15IIL
dmi.modalias: dmi:bvnLENOVO:bvrDKCN24WW:bd11/26/2019:svnLENOVO:pn81W8:pvrLenovoIdeaPadS145-15IIL:rvnLENOVO:rnLNVNB161216:rvrSDK0J40700WIN:cvnLENOVO:ct10:cvrLenovoIdeaPadS145-15IIL:
dmi.product.family: IdeaPad S145-15IIL
dmi.product.name: 81W8
dmi.product.sku: LENOVO_MT_81W8_BU_idea_FM_IdeaPad S145-15IIL
dmi.product.version: Lenovo IdeaPad S145-15IIL
dmi.sys.vendor: LENOVO

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Niko (therealhockenberry)]

I now tried installing the latest kernel 5.6.7 from https://kernel.ubuntu.com/~kernel-ppa/mainline/ and the problem still exists.

[Niko (therealhockenberry)]

Maybe helps: The touchpad identifies under Windows as "VEN_ELAN&DEV_0633".

[Niko (therealhockenberry)]

It is working now! Using kernel 5.4.0-42-generic and adding the "i8042.nopnp=1 pci=nocrs" kernel parameters to grub made the touchpad work.

(I also tried the solution proposed by Ferenc in Bug #1861610. It didn't work, but I cannot be sure if only using the kernel parameter works, so if it doesn't look there).