In my case, the buttons are completely inactive. I have a recording of my desktop, to see it reacting. I can use whtaever is behind, this is only on screen, it is not a real window, but it covers what is bellow.
** Attachment added: "authentication required visible and not active on screen and cannot close it" https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1845795/+attachment/5307563/+files/out.ogv -- 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/1845795 Title: authentication window got stuck over other windows at top left Status in gnome-shell package in Ubuntu: Confirmed Bug description: The "Authentication required" screen appeared while I was changing software repository settings, but it is stuck there: 1. I can click "cancel" but there is no effect 2. The window is now always on top of any other window, despite the original Software Repository Settings windows has been closed (actually, terminated manually) As you can see in the screenshot, The Firefox windows has focus now as I am typing in the address bar, but still the "dead" authentication window is on top. Using Ubuntu 19.10 on a Yoga Lenovo S940, upgraded from 19.04 --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu7 Architecture: amd64 CurrentDesktop: ubuntu:GNOME DisplayManager: gdm3 DistroRelease: Ubuntu 19.10 InstallationDate: Installed on 2019-09-12 (17 days ago) InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416) Package: gnome-shell 3.34.0-1ubuntu1 PackageArchitecture: amd64 ProcVersionSignature: Ubuntu 5.3.0-13.14-generic 5.3.0 RelatedPackageVersions: mutter-common 3.34.0-3ubuntu1 Tags: eoan Uname: Linux 5.3.0-13-generic x86_64 UpgradeStatus: Upgraded to eoan on 2019-09-21 (8 days ago) UserGroups: adm cdrom dip docker lpadmin microk8s plugdev sambashare sudo _MarkForUpload: True To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1845795/+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