I went ahead and upgraded to vivid. My kerberos/ldap problems are solved but I still get:
$ mailq postqueue: warning: close: Permission denied guest is trusty: ii postfix 2.11.0-1ubuntu1 amd64 High-performance mail transport agent host is vivid: ii lxc 1.1.0-0ubuntu1 amd64 Linux Containers userspace tools ii apparmor 2.9.1-0ubuntu7 amd64 User-space parser utility for AppArmor Linux venkman 3.19.0-9-generic #9-Ubuntu SMP Wed Mar 11 17:50:03 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux As #2, I get "Permission denied" ~997/1000 tries (in a loop). ubuntu@test:~$ for i in {1..1000}; do mailq; done 2>&1 | grep -v Permission Mail queue is empty Mail queue is empty Mail queue is empty Mail queue is empty ubuntu@test:~$ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1390223 Title: Apparmor related regression on access to unix sockets on a candidate 3.16 backport kernel To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1390223/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs