Tested on physical hardware with 19.04. The issue is still present but the viaul manifestaton is slightly different. Rather than black flickers it's more of a shading effect that flickers on and off with mouse movement. It can also be caused by enabling the option to extent the magnified contents beyond the bounds of the desktop.
-- 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/1831140 Title: GNOME Magnifier Flickering when using none-full screen modes Status in gnome-shell package in Ubuntu: New Bug description: When using the GNOME magnifier (Zoom) feature the magnified display flickers when used in any of the following modes: Left, Right, Top or Bottom screen part. This occures when the mouse moves towards the edge directly opossite to the magnified view. To reproduce: * Open GNOME Control Centre. * Go to Universal Access. * Click on Zoom. * Enable Zoom * Selct either Top, Bottom, Left or Right from the screen part drop down list. * Move the mouse cursor to the opossite edge of the screen to that where the magnified view is located. I have tested on multiple systems running Ubuntu 18.04. I am yet to test with 19.04. I use this feature to allow me to use two monitors with one showing a magnified view the other showing a normal view. Happy to provide additional details. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: gnome-shell 3.28.3+git20190124-0ubuntu18.04.2 ProcVersionSignature: Ubuntu 4.18.0-21.22~18.04.1-generic 4.18.20 Uname: Linux 4.18.0-21-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.9-0ubuntu7.6 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Thu May 30 19:14:43 2019 DisplayManager: gdm3 ExecutablePath: /usr/bin/gnome-shell InstallationDate: Installed on 2019-03-12 (78 days ago) InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) ProcEnviron: LANGUAGE=en_GB:en PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_GB.UTF-8 SHELL=/bin/bash 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/1831140/+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
