Searching on google I found this page: http://souriguha.wordpress.com/2011/03/08/how-to-solve-problem-with- thinkpadkslowd-kworker-on-linux-kernel-2-35-2-36/, and this worked for my X420:
echo N > /sys/module/drm_kms_helper/parameters/poll -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/883853 Title: Mouse sticks to desktop for a moment every 5 seconds To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/883853/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
