Hey there, I got some strange issue when use bluetooth device, below I will describe my system.
linux mint 17.4 Cinnamon 64 bits.
Core I7 - 8 gigs ram.
WIRELESS BLUETOOTH 380

With some devices if a move away few meters(i.e. 4 meters), bluetooth got disconnected . If I maintain it closer (less 0,5 meters of the laptop), works fine. I tested the same bluetooth device with other laptops and they work fine till 5 or 6 meters. I the feeling that my laptop's bluetooth does not have enough power for transmission. This issues occurs with headset, tablets, cell phones, etc. All tests was made with the same operating system and different laptops.