Comment 2 for bug 1045590

This may be a false alarm. An strace of update-manager shows this:

recvmsg(12, {msg_name(0)=NULL, msg_iov(1)=[{"l\3\1\1N\0\0\0o\0\0\0`\0\0\0\6\1s\0\7\0\0\0:1.1873\0\4\1s\0&\0\0\0org.freedesktop.PolicyKit.Error.Failed\0\0\5\1u\0:\0\0\0\10\1g\0\1s\0\0\7\1s\0\7\0\0\0:1.1872\0I\0\0\0('system-bus-name', {'name': ':1.1873'}): org.debian.apt.upgrade-packages\0\0\0\25\0\0\0status-authenticating\0\0\0(\0\0\0\6\1s\0\7\0\0\0:1.1873\0\5\1u\0009\0\0\0\7\1s\0\7\0\0\0"..., 2048}], msg_controllen=0, msg_flags=MSG_CMSG_CLOEXEC}, MSG_CMSG_CLOEXEC) = 190

And console-kit-daemon crashed on me in the same time frame. So it's possible that this is a permissions problem, nothing more. However, update-manager should do something more reasonable than closing with no feedback in the event of a permissions error.