https://bugs.launchpad.net/ubuntu/+source/linux/+bug/219463 and https://bugs.launchpad.net/ubuntu/+source/linux/+bug/222171 seen to be duplicates of this bug.
https:/ /bugs.launchpad .net/ubuntu/ +source/ linux/+ bug/219463 /bugs.launchpad .net/ubuntu/ +source/ linux/+ bug/222171
and
https:/
seen to be duplicates of this bug.