Deleting the synaptics driver resolves the issue. It appears the driver needs to be deleted with the introduction of the libinput driver (now that the synaptics driver has been deprecated).
However this issue/bug occurred as the synaptic driver was not deleted during the upgrade to 18.04 from 16.04 (most likely due the the fact that the config file was not empty - however it would be impossible for it to be empty if it was the driver used in 16.04, prior to the introduction of the libinput driver with the 18.04 upgrade). Suggestion: For all future upgrades to 18.04, there is the need to ensure the synaptic driver is removed to avoid breaking this functionality and introducing the conflict. If the user decides he/she needs the deprecated synaptics driver, they can always install it after. This way, Ubuntu 18.04 and beyond would not appear defective in this instance after an upgrade. Affects: Upgrades to 18.04 and newer. Conclusion: This bug can be closed when this is fixed in future releases of Ubuntu. I'm not sure who needs to be communicated about this, can someone help to see this through to ensure fix and thus closure? Thanks. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1760338 Title: Touchpad hotkey 'functional' but has no effect in 18.04 (Bionic) Status in Ubuntu: Confirmed Status in linux package in Ubuntu: Confirmed Status in xinput package in Ubuntu: Confirmed Status in xserver-xorg-input-synaptics package in Ubuntu: Confirmed Bug description: All the Fn keys are working (audio, mute, bright, volume and even wifi) except for enable/disable touchpad. Does not toggle the touchpad. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: xinput 1.6.2-1build1 ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10 Uname: Linux 4.15.0-13-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia .proc.driver.nvidia.gpus.0000.01.00.0: Error: [Errno 21] É um diretório: '/proc/driver/nvidia/gpus/0000:01:00.0' .proc.driver.nvidia.registry: Binary: "" .proc.driver.nvidia.version: NVRM version: NVIDIA UNIX x86_64 Kernel Module 390.42 Sat Mar 3 04:10:22 PST 2018 GCC version: gcc version 7.3.0 (Ubuntu 7.3.0-13ubuntu1) ApportVersion: 2.20.9-0ubuntu2 Architecture: amd64 BootLog: Error: [Errno 13] Permissão negada: '/var/log/boot.log' CompositorRunning: None CurrentDesktop: ubuntu-communitheme:ubuntu:GNOME Date: Sat Mar 31 15:41:59 2018 DistUpgraded: Fresh install DistroCodename: bionic DistroVariant: ubuntu DkmsStatus: nvidia, 390.42, 4.15.0-12-generic, x86_64: installed nvidia, 390.42, 4.15.0-13-generic, x86_64: installed virtualbox, 5.2.8, 4.15.0-12-generic, x86_64: installed virtualbox, 5.2.8, 4.15.0-13-generic, x86_64: installed GraphicsCard: Intel Corporation HD Graphics 530 [8086:191b] (rev 06) (prog-if 00 [VGA controller]) Subsystem: Toshiba America Info Systems HD Graphics 530 [1179:f840] InstallationDate: Installed on 2018-03-09 (21 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180309) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 008: ID 04f2:b446 Chicony Electronics Co., Ltd Bus 001 Device 003: ID 248a:8366 Bus 001 Device 002: ID 04f3:2228 Elan Microelectronics Corp. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: TOSHIBA Satellite S55t-C ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-13-generic root=UUID=62fa4fcd-f1c6-43f5-a86d-ccaae2565dac ro locale=pt_BR quiet splash vt.handoff=1 SourcePackage: xinput UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/08/2015 dmi.bios.vendor: INSYDE Corp. dmi.bios.version: 1.20 dmi.board.name: 06F4 dmi.board.vendor: FF50 dmi.board.version: Type2 - Board Version dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: OEM Chassis ManuFacturer dmi.chassis.version: OEM Chassis Version dmi.modalias: dmi:bvnINSYDECorp.:bvr1.20:bd10/08/2015:svnTOSHIBA:pnSatelliteS55t-C:pvrPSPUGU-00200D:rvnFF50:rn06F4:rvrType2-BoardVersion:cvnOEMChassisManuFacturer:ct10:cvrOEMChassisVersion: dmi.product.family: Type1Family dmi.product.name: Satellite S55t-C dmi.product.version: PSPUGU-00200D dmi.sys.vendor: TOSHIBA version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.91-2 version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.0~rc5-1ubuntu1 version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.0~rc5-1ubuntu1 version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu3 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1760338/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : email@example.com Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp