Public bug reported:

My touchpad (Lenovo Ideapad Slim 7, Intel version) was working fine
until I woke the laptop one time and it stopped working.  It did not
appear in /proc/bus/input/devices.

Restarting did not help.  However, after restarting into 5.8.0-25 the
touchpad worked again (devices file attached).  Then restarting again
into 5.8.0-44 everything was working.

ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: linux-image-5.8.0-44-generic 5.8.0-44.50
ProcVersionSignature: Ubuntu 5.8.0-44.50-generic 5.8.18
Uname: Linux 5.8.0-44-generic x86_64
ApportVersion: 2.20.11-0ubuntu50.5
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  jack       1374 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Sat Mar 13 08:48:31 2021
InstallationDate: Installed on 2021-03-10 (2 days ago)
InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
MachineType: LENOVO 82A3
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.8.0-44-generic 
root=UUID=01a43871-5873-4879-ae9f-e7a807101182 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-5.8.0-44-generic N/A
 linux-backports-modules-5.8.0-44-generic  N/A
 linux-firmware                            1.190.3
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/30/2020
dmi.bios.release: 1.19
dmi.bios.vendor: LENOVO
dmi.bios.version: FBCN19WW
dmi.board.asset.tag: ���������������
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40700 WIN
dmi.chassis.asset.tag: ���������������
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Yoga Slim 7 14ITL05
dmi.ec.firmware.release: 1.17
dmi.modalias: 
dmi:bvnLENOVO:bvrFBCN19WW:bd09/30/2020:br1.19:efr1.17:svnLENOVO:pn82A3:pvrYogaSlim714ITL05:rvnLENOVO:rnLNVNB161216:rvrSDK0J40700WIN:cvnLENOVO:ct10:cvrYogaSlim714ITL05:
dmi.product.family: Yoga Slim 7 14ITL05
dmi.product.name: 82A3
dmi.product.sku: LENOVO_MT_82A3_BU_idea_FM_Yoga Slim 7 14ITL05
dmi.product.version: Yoga Slim 7 14ITL05
dmi.sys.vendor: LENOVO

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Confirmed


** Tags: amd64 apport-bug groovy touchpad

** Attachment added: "touchpad-debug.txt"
   
https://bugs.launchpad.net/bugs/1919013/+attachment/5476219/+files/touchpad-debug.txt

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https://bugs.launchpad.net/bugs/1919013

Title:
  Touchpad stopped working and only worked after switching kernel

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