Hi, I have checked Ubuntu 14.10 in MacbookPro 11,2 and the same happens. However, after searching more information, I found the problem and the solution. The problem is that process `kworker` is responsible for the usage. The solution is well documented here:
http://askubuntu.com/questions/176565/why-does-kworker-cpu-usage-get-so- high -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1451117 Title: ubuntu 15.04 CPU has one core constantly over 80% usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1451117/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs