I had same problem, but after removing xserver-xorg-input-synaptics and other touchpad related drivers except xserver-xorg-input-libinput, and then rebooting it got solved. See if that helps :)
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1876628 Title: App list not scrolling properly with touchpad Status in GNOME Shell: Unknown Status in gnome-shell package in Ubuntu: Triaged Bug description: Steps to reproduce (20.04), shell 3.36.1: 1. Open 'Show Applications' -> 'All' 2. Attempt to scroll through the pages using a touchpad. Expected result: Scrolls through pages of applications one at a time. Actual result: Scrolls to second page of applications but will go no further. This happens whether two-finger or edge scrolling is used. Using an actual mouse with a scroll wheel works as expected. Using this in conjunction with the touchpad reveals horribly broken behaviour: - Clicking on the 'dot' for any of the pages will let the touchpad scroll at most one page in either direction, if the mouse is not moved - Moving the physical mouse lets the 'momentum' of the touchpad scrolling advance the list further as expected. Incidentally, the application menu doesn't honour the 'natural scrolling' setting for the touchpad in the mouse settings - I will file a separate bug report for this but it may be of interest for whoever looks at this. --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu27 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME DisplayManager: gdm3 DistroRelease: Ubuntu 20.04 InstallationDate: Installed on 2017-11-12 (903 days ago) InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) NonfreeKernelModules: nvidia_modeset nvidia Package: gnome-shell 3.36.1-5ubuntu1 PackageArchitecture: amd64 ProcVersionSignature: Ubuntu 5.4.0-28.32-generic 5.4.30 RelatedPackageVersions: mutter-common 3.36.1-3ubuntu3 Tags: focal Uname: Linux 5.4.0-28-generic x86_64 UpgradeStatus: Upgraded to focal on 2020-04-30 (3 days ago) UserGroups: adm cdrom dialout dip lpadmin plugdev sambashare sudo wireshark _MarkForUpload: True To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-shell/+bug/1876628/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
