You're right, its a kernel problem. check this links please.
https://launchpad.net/ubuntu/+source....17/+bug/67810 http://ubuntuforums.org/showthread.php?t=404977&page=2 -- shutdown method https://bugs.launchpad.net/bugs/104741 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs