I also faced this issue multiple times after upgrading to 18.10. Screenshot is attached
Behavior: 1) Authentication Required dialog stucks at top left of the screen 2) Password text field becomes disabled so we cannot enter anything 3) Cancel button can be hovered and clicked from the button left but it does nothing 4) Authenticate button doesn't show any hover effect ** Attachment added: "Authentication Required Stuck at top left of the screen" https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1845795/+attachment/5300563/+files/authenticationRequiredStuckTopLeft.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1845795 Title: authentication window got stuck over other windows at top left To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1845795/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs