Comment 41 for bug 271070

it might be frustrating, for you if your system doesn't boot properly.
but initially this was no bug reporting such problems.
please read https://bugs.launchpad.net/ubuntu/+source/linux/+bug/271070/comments/18
it is very likely that the system hangs you get are not connected to this bug and the message is just the last thing you can read.
when reporting a new bug, please read https://wiki.ubuntu.com/KernelTeamBugPolicies first, to net get stuck with simple questions left open.