I encountered this issue on latest Fedora 32. So this is not unique to ubuntu. I have a dual booted system and when I tried to access windows partition data from fedora, I was required to type the password in authentication dialogue, after which I could access windows data. Then when I locked and unlocked again, this unclickable authentication dialogue box was stuck on top-left corner of the screen (If I tried to click it, whatever was 'behind' it was clicked).
Pressing Alt + F2 and then 'f' removed it. -- 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/gnome-shell/+bug/1824874/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs