I've got the same problem on computers that have got a fresh install, but that have had their LDAP configuration updated from a puppetmaster server. The problem appeared after I set up LDAP/PAM authentication on the computers. The error message from /var/log/messages:
Dec 8 11:29:48 vust1-3 kernel: [91665.959930] polkit-agent-he[17495]: segfault at 4 ip 002dbb90 sp bfe664e0 error 4 in libpam.so.0.82.1[2d8000+b000] Please tell if you need more info. -- Policykit authentication fails with 'Error.Failed: Only uid 0 may invoke this method.' https://bugs.launchpad.net/bugs/439552 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs