The issue does exist on 3.2.0-15-generic. After uninstalling powernap package, the issue doesn't happen any more, so looks it is caused by powernap stopping and starting cpu frequently.
If I connects my T410 with not very good signal wifi, the problem can be triggered very easily. ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/921944 Title: [precise] linux kernel: bad: scheduling from the idle thread! To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/921944/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs