I'm on a MacBook Air, purchased April 2012, 15" w standard specs -- 1.7GHz Intel Core i5, 4GB of RAM, SSD hard drive, Intel graphics etc.
I am currently running 64-bit Ubuntu 12.04 off a USB disk, set up via my Mac and diskutil and dd. I plugged in two external hard drives (a 2TB I am backing up to a 3TB). When I walked away and came back after 3 minutes, the laptop was almost unusable. I stumbled upon this thread and found that comment #30 (https://bugs.launchpad.net/ubuntu/+source/linux/+bug/887793/comments/30) had the solution: sudo -i echo N> /sys/module/drm_kms_helper/parameters/poll echo "options drm_kms_helper poll=N">/etc/modprobe.d/local.conf As soon as those commands were entered, kworker went from 90% of my CPU to 2-3%. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/887793 Title: Kworker constantly taking about 100% CPU To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/887793/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
