I had been facing this problem since I upgraded 14.04 to 15.xx and recently 16.10. @kerobyan-mk's method of reinstalling signon-ui worked for me too.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1235742 Title: signon-ui crashed with SIGABRT in QMessageLogger::fatal() To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/signon-ui/+bug/1235742/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs