[Bug 1881322] Re: Touchpad not detected in 'Lenovo V15-IIL model 82C5' after installing Ubuntu 20.04

Hi, In my case it was solved after adding both parameters,
"i8042.nopnp=1 pci=nocrs" I tried adding "i8042.nopnp" alone and it
didn't work.

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https://bugs.launchpad.net/bugs/1881322

Title:
Touchpad not detected in 'Lenovo V15-IIL model 82C5' after installing
Ubuntu 20.04

Status in linux package in Ubuntu:
Incomplete

Bug description:
Ubuntu 20.04 is installed in a brand new Lenovo V15-IIL alongside
Windows 10. According to lenovo's support page, the driver for windows
is Synaptics 19.5.10.149_Elan 22.4.18.1. In windows the touchpad works
fine.

This model has two options in BIOS regarding Fn Keys, a "Smart Fn key"
that toogles the Fn key on/off each time you press it and a "Foolproof
Fn Key" that maps the Fn key to Ctrl when you press a combinations of
keys that does not have a Fn assigned. When I enable the "foolproof fn
key" in the BIOS, the Fn + F1...F12 and the sound driver stop working
(i dont have sound, i can't change the volume and the volume icon in
the GUI does not show). Fn+F6 (to enable/disable touchpad) can't
enable it.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.4.0-33-generic 5.4.0-33.37
ProcVersionSignature: Ubuntu 5.4.0-33.37-generic 5.4.34
Uname: Linux 5.4.0-33-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: fdadam 1434 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Fri May 29 13:08:24 2020
InstallationDate: Installed on 2020-05-28 (1 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
Lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 04f2:b624 Chicony Electronics Co., Ltd Integrated Camera
Bus 001 Device 002: ID 0458:0186 KYE Systems Corp. (Mouse Systems) Genius DX-120 Mouse
Bus 001 Device 004: ID 8087:0aaa Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: LENOVO 82C5
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-33-generic root=UUID=fd0c8ed1-6032-467c-9902-3094e6740be8 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-5.4.0-33-generic N/A
linux-backports-modules-5.4.0-33-generic N/A
linux-firmware 1.187
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/04/2020
dmi.bios.vendor: LENOVO
dmi.bios.version: DKCN26WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: NO DPK
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo V15-IIL
dmi.modalias: dmi:bvnLENOVO:bvrDKCN26WW:bd03/04/2020:svnLENOVO:pn82C5:pvrLenovoV15-IIL:rvnLENOVO:rnLNVNB161216:rvrNODPK:cvnLENOVO:ct10:cvrLenovoV15-IIL:
dmi.product.family: V15-IIL
dmi.product.name: 82C5
dmi.product.sku: LENOVO_MT_82C5_BU_idea_FM_V15-IIL
dmi.product.version: Lenovo V15-IIL
dmi.sys.vendor: LENOVO

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