Can you confirm upstream 3.16.6 still does in fact fix this bug: http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.16.6-utopic/
If it does, then I'll compare what is in the Ubuntu kernel versus the Upstream kernel that may be causing this. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1386473 Title: Not using all cores after upgrade to 14.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1386473/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs