This has been fixed in wily kernel
http://kernel.ubuntu.com/git/ubuntu/ubuntu-wily.git/commit/drivers/bluetooth?id=c065d25c20c4bf20b9b1f6a4edc595a6af8608bd
In Xenial
http://kernel.ubuntu.com/git/ubuntu/ubuntu-xenial.git/commit/drivers/bluetooth?id=747a4b4f24b030f85562d6a326ece585e5fede02
This has been fixed in wily kernel
http:// kernel. ubuntu. com/git/ ubuntu/ ubuntu- wily.git/ commit/ drivers/ bluetooth? id=c065d25c20c4 bf20b9b1f6a4edc 595a6af8608bd
In Xenial
http:// kernel. ubuntu. com/git/ ubuntu/ ubuntu- xenial. git/commit/ drivers/ bluetooth? id=747a4b4f24b0 30f85562d6a326e ce585e5fede02