This is really easy to reproduce. Just arrange your screens so your external screen is above the internal one instead of to the left or right. Now when you switch virtual desktops the contents are moved through the external screen.
-- 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/1774498 Title: Windows flash by external screen on virtual desktop change Status in gnome-shell package in Ubuntu: Incomplete Bug description: gnome-shell has the very interesting default of only doing virtual desktops on the internal screen. This works fine but has a strange visual glitch when changing virtual desktops where the contents of the internal screen flash through the external one. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: gnome-shell 3.28.1-0ubuntu2 ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17 Uname: Linux 4.15.0-22-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.1 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Thu May 31 21:06:47 2018 DisplayManager: gdm3 InstallationDate: Installed on 2018-05-31 (0 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) SourcePackage: gnome-shell UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1774498/+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
