Linux 5.0.0-13 In Upgrade From Cosmic to Disco Broke Synaptic Touchpad

[Harley A.W. Lorenzo]

In a Kubuntu Cosmic install, I had a working Synaptic touchpad. Upon upgrading to Disco, and only while on the 5.0.0-13 kernel, I lose touchpad support. It appears that the kernel still properly finds it and loads the psmouse module, but libinput does not receive any input from the device at all.

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: linux-image-5.0.0-13-generic 5.0.0-13.14
ProcVersionSignature: Ubuntu 5.0.0-13.14-generic 5.0.6
Uname: Linux 5.0.0-13-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.10-0ubuntu27
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: harley 1708 F.... pulseaudio
CurrentDesktop: KDE
Date: Wed May 1 21:15:15 2019
InstallationDate: Installed on 2019-04-10 (21 days ago)
InstallationMedia: Kubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.2)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 004: ID 0a5c:216d Broadcom Corp. BCM43142A0 Bluetooth 4.0
 Bus 001 Device 003: ID 1a40:0101 Terminus Technology Inc. Hub
 Bus 001 Device 002: ID 064e:c346 Suyin Corp.
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: HP HP Notebook
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.0.0-13-generic root=UUID=0418c64c-d98d-4189-acc8-7f845203fc16 ro quiet splash vt.handoff=1
RelatedPackageVersions:
 linux-restricted-modules-5.0.0-13-generic N/A
 linux-backports-modules-5.0.0-13-generic N/A
 linux-firmware 1.178
SourcePackage: linux
UpgradeStatus: Upgraded to disco on 2019-04-18 (13 days ago)
dmi.bios.date: 05/19/2016
dmi.bios.vendor: Insyde
dmi.bios.version: F.09
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: 81F1
dmi.board.vendor: HP
dmi.board.version: 64.29
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnInsyde:bvrF.09:bd05/19/2016:svnHP:pnHPNotebook:pvrType1ProductConfigId:rvnHP:rn81F1:rvr64.29:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.family: 103C_5335KV G=N L=CON B=HP
dmi.product.name: HP Notebook
dmi.product.sku: X0S19UA#ABA
dmi.product.version: Type1ProductConfigId
dmi.sys.vendor: HP

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

This change was made by a bot.

[Hui Wang (hui.wang)]

Probably your device can't work well under i2c bus.

please have a try:
add "psmouse.synaptics_intertouch=0" to the kernel bootargs.

[Harley A.W. Lorenzo (mrselfdestruct57)]

>Probably your device can't work well under i2c bus.
>
>please have a try:
>add "psmouse.synaptics_intertouch=0" to the kernel bootargs.

Yep, that fixed it! Hope all of this information can help patch it for anyone else affected!