I solved the problem with
$ sudo killall -9 gnome-shell
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https://bugs.launchpad.net/bugs/1824874
Title:
undismissable, unclickable authentication dialog left on s
** Attachment added: "AptOrdering.txt"
http://launchpadlibrarian.net/48988337/AptOrdering.txt
** Attachment added: "Dependencies.txt"
http://launchpadlibrarian.net/48988338/Dependencies.txt
** Attachment added: "Df.txt"
http://launchpadlibrarian.net/48988339/Df.txt
** Attachment added:
Public bug reported:
This error was reported automatically by the SO.
Sincerely
Pedro Machado
ProblemType: Package
DistroRelease: Ubuntu 10.04
Package: libglib2.0-0 2.24.1-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.32-21.32-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-21-generic i686
Architecture