Following upgrade from 19.10 to 20.04 Synaptics touchpad does not work with XOrg, but does with Wayland KDE session

[Brian McGeeney]

Touchpad works correctly in wayland session

Touchpad in system settings is shown in grey

Device is recognised by OS, but does not move the cursor or respond to press or multi-touch gestures in KDE on X. USB mouse ios recognised and operates correctly. Problem identified immediately after upgrade (was working correctly prior to upgrade)

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xserver-xorg-input-libinput 0.29.0-1
ProcVersionSignature: Ubuntu 5.4.0-14.17-generic 5.4.18
Uname: Linux 5.4.0-14-generic x86_64
ApportVersion: 2.20.11-0ubuntu19
Architecture: amd64
CurrentDesktop: KDE
Date: Tue Mar 10 21:33:46 2020
DistUpgraded: 2020-03-07 22:56:23,303 DEBUG Running PostInstallScript: './xorg_fix_proprietary.py'
DistroCodename: focal
DistroVariant: ubuntu
InstallationDate: Installed on 2018-01-02 (797 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
MachineType: Acer Aspire E5-571
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-14-generic root=UUID=27d98ac5-3965-4693-8ca0-a5028c6eed60 ro quiet splash vt.handoff=7
SourcePackage: xserver-xorg-input-libinput
UpgradeStatus: Upgraded to focal on 2020-03-07 (2 days ago)
dmi.bios.date: 05/06/2014
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: V1.04
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: EA50_HB
dmi.board.vendor: Acer
dmi.board.version: V1.04
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnInsydeCorp.:bvrV1.04:bd05/06/2014:svnAcer:pnAspireE5-571:pvrV1.04:rvnAcer:rnEA50_HB:rvrV1.04:cvnAcer:ct10:cvrChassisVersion:
dmi.product.family: SharkBay System
dmi.product.name: Aspire E5-571
dmi.product.sku: Aspire E5-571_0866_V1.04
dmi.product.version: V1.04
dmi.sys.vendor: Acer
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.100-4
version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.0-1ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 20.0.0-1ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.20.7-2ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20190815-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1