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
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https://bugs.launchpad.net/bugs/921944
Title:
[precise] linux kernel: bad: scheduling from the idle thread!
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