I believe this is a duplicate of this bug: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1057593
I would recommend upgrading your kernel such that it has this fix.
I believe this is a duplicate of this bug: /bugs.launchpad .net/ubuntu/ +source/ linux/+ bug/1057593
https:/
I would recommend upgrading your kernel such that it has this fix.