The same here after a new installation of Ubuntu 18.04.
uname -a
Linux sal-Lenovo-B50-30 4.15.0-20-generic #21-Ubuntu SMP Tue Apr 24 06:16:15 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
lsusb | grep -i blue
Bus 001 Device 004: ID 0cf3:3004 Atheros Communications, Inc. AR3012 Bluetooth 4.0
The same here after a new installation of Ubuntu 18.04.
uname -a
Linux sal-Lenovo-B50-30 4.15.0-20-generic #21-Ubuntu SMP Tue Apr 24 06:16:15 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
lsusb | grep -i blue
Bus 001 Device 004: ID 0cf3:3004 Atheros Communications, Inc. AR3012 Bluetooth 4.0