I got hit by the same issue, with the same unlucky kernel (installed from normal update channel):
root@x230:~# uname -a Linux x230 3.13.0-66-generic #108-Ubuntu SMP Wed Oct 7 15:20:27 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux Will read suggestions above before going to back to classical VM... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1504781 Title: lxc-test-ubuntu hangs forever in trusty-proposed with Linux 3.13.0-66: AppArmor denies /dev/ptmx mounting To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1504781/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs