Thanks for the bug report. I am also using gnome-shell 3.28.3+git20190124-0ubuntu18.04.1 mutter 3.28.3+git20190124-0ubuntu18.04.1
but cannot reproduce this bug. In particular I can't see any option to "0. Change the default Alt+Tab to switch windows". Please: 1. Detail how to "0. Change the default Alt+Tab to switch windows". 2. Try uninstalling all your extensions and tell us if the bug still happens: "b'org.gnome.shell' b'enabled-extensions' b"['GPaste@gnome-shell- extensions.gnome.org', 'openweather-extens...@jenslody.de', 'user-theme @gnome-shell-extensions.gcampax.github.com', 'no-symbolic- ic...@evanwelsh.com', 'update-extensi...@franglais125.gmail.com', 'ubuntu-appindicat...@ubuntu.com', 'ubuntu-d...@ubuntu.com', 'gsconn...@andyholmes.github.io']" ** Summary changed: - Alt+Tab produces visual artefacts when a child window is open + Alt+Tab produces visual artefacts when a modal dialog is open ** Changed in: gnome-shell (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1822857 Title: Alt+Tab produces visual artefacts when a modal dialog is open To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1822857/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs