For me, sometimes after login login overlay is not disappeared and prevent from showing any window, but mouse and maybe keyboard events still delivered to some screen areas (see screenshoot).
I do not have any hardware keys, such as yubikey Fortunately, Alt+F2, "r" helps me. ** Attachment added: "LoginOverlayBug.png" https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1824874/+attachment/5379697/+files/LoginOverlayBug.png -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1824874 Title: undismissable, unclickable authentication dialog left on screen (top- left corner) after policykit authentication [pushModal: invocation of begin_modal failed] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1824874/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs