Before, I missed the command "sudo killall /usr/bin/perl; sudo /usr/share/system-tools-backends-2.0/scripts/SystemToolsBackends.pl -m UsersConfig -v &> ~/stb-users.log".
So, I re-do the commands stated in https://wiki.ubuntu.com/DebuggingGnomeSystemTools . I uploaded stb-users.log here. ** Attachment added: "stb-users.log" https://bugs.launchpad.net/ubuntu/+source/gnome-system-tools/+bug/992367/+attachment/3124472/+files/stb-users.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/992367 Title: An error occurred when trying to change the Full Name of my user account. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-system-tools/+bug/992367/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs