[Bug 1853277] Re: Lenovo ThinkBook 14-IML Touchpad not showing up in /proc/bus/input/devices

Hi,

I was tracking this error since very long but still it seems that the issue still exist.
Even after Installing the above mentioned kernel touch-pad is still not working neither is visible in /proc/bus/input/devices. (attached is the cat /proc/bus/input/devices output)

>uname -a
Linux dhinchakdhoom-Thinkbook 5.6.0-1032-oem #33-Ubuntu SMP Fri Oct 16 12:04:33 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

** Attachment added: "devices.txt"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1853277/+attachment/5426289/+files/devices.txt

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https://bugs.launchpad.net/bugs/1853277

Title:
Lenovo ThinkBook 14-IML Touchpad not showing up in
/proc/bus/input/devices

Status in linux package in Ubuntu:
Triaged
Status in linux-oem-5.6 package in Ubuntu:
Invalid
Status in linux source package in Focal:
Fix Committed
Status in linux-oem-5.6 source package in Focal:
Fix Released
Status in linux source package in Groovy:
Triaged
Status in linux-oem-5.6 source package in Groovy:
Invalid

Bug description:
== SRU Justification ==
[Impact]
Touchpad on sereval Lenovo ThinkBook doesn't work.

[Fix]
Maintain method calling ordering by calling _REG before issuing _STA, as
ACPI spec suggested, for I2C ACPI devices.

[Test]
Positive feedback from several users.

[Regression Potential]
If there are some systems that rely on the wrong calling ordering then
there's a regression risk. However it's rather unlikely.

== Original Bug Report ==
This is happening on a ThinkBook 14 IML 20RV.

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: linux-image-5.3.0-18-generic 5.3.0-18.19+1
ProcVersionSignature: Ubuntu 5.3.0-18.19-generic 5.3.1
Uname: Linux 5.3.0-18-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu8
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: ubuntu 1848 F.... pulseaudio
CasperVersion: 1.427
CurrentDesktop: ubuntu:GNOME
Date: Wed Nov 20 11:10:52 2019
LiveMediaBuild: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
MachineType: LENOVO 20RV
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=C.UTF-8
 SHELL=/bin/bash
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/username.seed quiet splash ---
RelatedPackageVersions:
 linux-restricted-modules-5.3.0-18-generic N/A
 linux-backports-modules-5.3.0-18-generic N/A
 linux-firmware 1.183
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/10/2019
dmi.bios.vendor: LENOVO
dmi.bios.version: CJCN21WW
dmi.board.name: LVA/LVAB
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697 WIN
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.modalias: dmi:bvnLENOVO:bvrCJCN21WW:bd10/10/2019:svnLENOVO:pn20RV:pvrLenovoThinkBook14-IML:rvnLENOVO:rnLVA/LVAB:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvr:
dmi.product.family: ThinkBook 14-IML
dmi.product.name: 20RV
dmi.product.sku: LENOVO_MT_20RV_BU_idea_FM_ThinkBook 14-IML
dmi.product.version: Lenovo ThinkBook 14-IML
dmi.sys.vendor: LENOVO

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