This appears to be very similar to Bug #185589 (at least the title and initial portions of the report).
For the record, I have experienced this same issue using Xubuntu hardy. Selecting Applications > System > Users and Groups, and then Selecting "Unlock" produces the "cannot unlock user&groups: "could not authenticate. An unexpected error has occurred"" message. $ dpkg -l gnome-system-tools | cat Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Installed/Config-f/Unpacked/Failed-cfg/Half-inst/t-aWait/T-pend |/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad) ||/ Name Version Description +++-==========================================-=============================-================================================ ii gnome-system-tools 2.21.92-0ubuntu1 Cross-platform configuration utilities for GNOME $ dpkg -l policykit | cat Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Installed/Config-f/Unpacked/Failed-cfg/Half-inst/t-aWait/T-pend |/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad) ||/ Name Version Description +++-==========================================-=============================-============================================================= ii policykit 0.7-2ubuntu4 framework for managing administrative policies and privileges -- [users-admin] Unlock -> "Could not authenticate. An unexpected error has occurred." https://bugs.launchpad.net/bugs/194496 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is a direct subscriber. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
