Comment 36 for bug 144030

Xdevent, what you said in https://bugs.launchpad.net/ubuntu/+source/linux/+bug/144030/comments/25 that it is a bug in the kernel. But likely a different one than this one.
You may read https://wiki.ubuntu.com/KernelTeamBugPolicies#head-895899d229ab9dbf5d40d51021fb6d497b094995 to help you get the information that would be necessary for a developer to fix the bug, but indeed it is not easy to get at it.