Figured out how to reproduce this: Appended screenshot 1 demonstrates how my favorites bar looks like normally.
When scrolling down with two fingers with the mouse over the bar, the icons are gone (see screenshot 2). Icons cannot be called back by reverse scrolling with the mouse cursor in the favorites bar. Workaround: Screen-lock and unlock will bring up the fav-bar correctly. ** Attachment added: "Screenshot with fav icons in place" https://bugs.launchpad.net/ubuntu/+source/gnome-session/+bug/1717486/+attachment/4951676/+files/Screenshot%20from%202017-09-17%2013-12-30.png -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-session in Ubuntu. https://bugs.launchpad.net/bugs/1717486 Title: gnome visual issues Status in gnome-session package in Ubuntu: New 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-session/+bug/1717486/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

