I can confirm this bug, and the workaround with gsettings works. I encountered this same bug on two different machines on 18.04, both updated multiple times daily, one with a Logitech mouse + unifying receiver and the other with a standard Apple wired mighty mouse, on both Wayland and Xorg. I think this bug is quite universal, the Logitech mouse machine uses Xorg daily with an HD 5570 and the mighty mouse machine uses Wayland daily with a GTX 760 (nouveau).
Since it occurred with a wired mighty mouse (and a dongle wireless USB mouse), I don't think it is specific to bluetooth mice. It also occurs when scrolling horizontally with the scroll "ball" that can scroll in all directions. The same issue also occurs for me when scrolling horizontally or vertically on the popup menu from single-clicking an app with multiple dots/instances, by that I'm referring to the menu with all the instances listed (like gnome-terminal) and that allows one to choose which one to bring to the front. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell-extension-ubuntu-dock in Ubuntu. https://bugs.launchpad.net/bugs/1717486 Title: icons missing after 2 fingers/horizontal scrolling on the dock Status in gnome-shell-extension-ubuntu-dock package in Ubuntu: Confirmed Bug description: since the upgrade of gnome-session from 3.25.90 to 3.26.0 I observe weird visual phenomena. 1. Icons in the task bar disappear (and only appear after logout/login) 2. Windows get drawn with black margins and sometimes with black canvas (gets away after a second or so) Issue can be related to upgrade of libmutter (libmutter-1-0:amd64 3.25.91+20170902~ce515c5-1ubuntu1 -> 3.26.0-1) ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: gnome-session (not installed) ProcVersionSignature: Ubuntu 4.13.0-11.12-generic 4.13.1 Uname: Linux 4.13.0-11-generic x86_64 ApportVersion: 2.20.7-0ubuntu1 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Fri Sep 15 12:33:43 2017 InstallationDate: Installed on 2017-09-05 (9 days ago) InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170902) SourcePackage: gnome-session UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell-extension-ubuntu-dock/+bug/1717486/+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
