I can confirm that this still occurs with a clean install of 14.04.2. Adding the specified configuration does indeed fix the problem, but this is not apparently part of the default configuration.
** Changed in: irqbalance (Ubuntu) Status: Invalid => Confirmed -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to irqbalance in Ubuntu. https://bugs.launchpad.net/bugs/1321425 Title: irqbalance affinity_hint subset empty in /var/log/syslog To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/irqbalance/+bug/1321425/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs