[HP ProBook 450 G3] Touchpad not being detected

[Palash Aggrawal]

Details as mentioned here - https://wiki.ubuntu.com/DebuggingTouchpadDetection
Laptop model - HP ProBook 450 G3
Touchpad manufacturer - Synaptics
Seeing issue since - Not sure, a few months

My touchpad started malfunctioning (pointer moving by itself). To be able to finish my work, I had disabled my touchpad temporarily using "xinput disable <id-number-of-touchpad". But when I tried to re-enable it again, I could no longer find the touchpad in the "xinput --list" output.

Output of "cat /proc/bus/input/devices" also no longer shows the touchpad (the output is attached)

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-193-generic 4.15.0-193.204
ProcVersionSignature: Ubuntu 4.15.0-193.204-generic 4.15.18
Uname: Linux 4.15.0-193-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.9-0ubuntu7.28
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/pcmC0D0p: cosmopal 3229 F...m pulseaudio
 /dev/snd/controlC0: cosmopal 3229 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Wed Oct 5 15:37:47 2022
InstallationDate: Installed on 2018-12-21 (1384 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
MachineType: HP HP ProBook 450 G3
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-193-generic root=UUID=b452106b-5b49-41ed-af84-04015fe95bc1 ro quiet splash vt.handoff=1
RelatedPackageVersions:
 linux-restricted-modules-4.15.0-193-generic N/A
 linux-backports-modules-4.15.0-193-generic N/A
 linux-firmware 1.173.21
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/02/2020
dmi.bios.vendor: HP
dmi.bios.version: N78 Ver. 01.45
dmi.board.name: 8101
dmi.board.vendor: HP
dmi.board.version: KBC Version 40.73
dmi.chassis.asset.tag: 5CD5474227
dmi.chassis.type: 10
dmi.chassis.vendor: HP
dmi.modalias: dmi:bvnHP:bvrN78Ver.01.45:bd01/02/2020:svnHP:pnHPProBook450G3:pvr:rvnHP:rn8101:rvrKBCVersion40.73:cvnHP:ct10:cvr:
dmi.product.family: 103C_5336AN G=N L=BUS B=HP S=PRO
dmi.product.name: HP ProBook 450 G3
dmi.sys.vendor: HP

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

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