After 5 years my laptop is in perfect condition (still).But my built-in bluetooth is not what it used to be (thanks to the extensive use of it) and fails to load at boot pretty much.Because of extensive use I opted to buy a 10 dollar bluetooth stick which took over the job of the built-in one.However, the built-in one is mostly not on but sometimes it still gives a spark. At that times it's sometimes really annoying because it just screws my settings and overwrites several things.My question: how can I make sure the built-in bluetooth is permanently disabled while the USB-device is still able to send my audio/pointing devices/... through.System: Linux Mint 18 (Base: Ubuntu 16.04)lsusb-output:jeroen@laptop ~ $ lsusbBus 002 Device 002: ID 5986:02ac Acer, Inc Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hubBus 004 Device 002: ID 138a:0018 Validity Sensors, Inc. Fingerprint scannerBus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hubBus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub(Built-in BT) Bus 003 Device 004: ID 0a5c:21b4 Broadcom Corp. BCM2070 Bluetooth 2.1 + EDR(USB-BT) Bus 003 Device 006: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hubBus 008 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hubBus 007 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hubBus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hubBus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hubUpdate: test output(as requested by Dirkt)jeroen@laptop ~ $ sudo hcitool devDevices:    hci0    00:1B:DC:0F:73:5D    hci1    CC:52:AF:A8:71:B5## Plugged out the USB-BT donglejeroen@laptop ~ $ sudo hcitool devDevices:    hci1    CC:52:AF:A8:71:B5## Plugged in the USB-BT donglejeroen@laptop ~ $ sudo rfkill list0: phy0: Wireless LAN    Soft blocked: no    Hard blocked: no1: brcmwl-0: Wireless LAN    Soft blocked: no    Hard blocked: no4: hp-wifi: Wireless LAN    Soft blocked: no    Hard blocked: no5: hp-bluetooth: Bluetooth    Soft blocked: no    Hard blocked: no6: hci1: Bluetooth    Soft blocked: no    Hard blocked: no8: hci0: Bluetooth    Soft blocked: no    Hard blocked: nojeroen@laptop ~ $ sudo rfkill block 5jeroen@laptop ~ $ sudo rfkill list0: phy0: Wireless LAN    Soft blocked: no    Hard blocked: no1: brcmwl-0: Wireless LAN    Soft blocked: no    Hard blocked: no4: hp-wifi: Wireless LAN    Soft blocked: no    Hard blocked: no5: hp-bluetooth: Bluetooth    Soft blocked: no    Hard blocked: no6: hci1: Bluetooth    Soft blocked: no    Hard blocked: no8: hci0: Bluetooth    Soft blocked: no    Hard blocked: nojeroen@laptop ~ $ sudo rfkill block 6jeroen@laptop ~ $ sudo rfkill list0: phy0: Wireless LAN    Soft blocked: no    Hard blocked: no1: brcmwl-0: Wireless LAN    Soft blocked: no    Hard blocked: no4: hp-wifi: Wireless LAN    Soft blocked: no    Hard blocked: no5: hp-bluetooth: Bluetooth    Soft blocked: no    Hard blocked: no6: hci1: Bluetooth    Soft blocked: yes    Hard blocked: no8: hci0: Bluetooth    Soft blocked: no    Hard blocked: nojeroen@laptop ~ $ sudo rfkill block 8jeroen@laptop ~ $ sudo rfkill list0: phy0: Wireless LAN    Soft blocked: no    Hard blocked: no1: brcmwl-0: Wireless LAN    Soft blocked: no    Hard blocked: no4: hp-wifi: Wireless LAN    Soft blocked: no    Hard blocked: no5: hp-bluetooth: Bluetooth    Soft blocked: no    Hard blocked: no6: hci1: Bluetooth    Soft blocked: yes    Hard blocked: no8: hci0: Bluetooth    Soft blocked: yes    Hard blocked: nojeroen@laptop ~ $ sudo rfkill unblock 8jeroen@laptop ~ $ sudo rfkill list0: phy0: Wireless LAN    Soft blocked: no    Hard blocked: no1: brcmwl-0: Wireless LAN    Soft blocked: no    Hard blocked: no4: hp-wifi: Wireless LAN    Soft blocked: no    Hard blocked: no5: hp-bluetooth: Bluetooth    Soft blocked: no    Hard blocked: no6: hci1: Bluetooth    Soft blocked: no    Hard blocked: no8: hci0: Bluetooth    Soft blocked: no    Hard blocked: nojeroen@laptop ~ $ sudo rfkill unblock 6jeroen@laptop ~ $ sudo rfkill list0: phy0: Wireless LAN    Soft blocked: no    Hard blocked: no1: brcmwl-0: Wireless LAN    Soft blocked: no    Hard blocked: no4: hp-wifi: Wireless LAN    Soft blocked: no    Hard blocked: no5: hp-bluetooth: Bluetooth    Soft blocked: no    Hard blocked: no6: hci1: Bluetooth    Soft blocked: no    Hard blocked: no8: hci0: Bluetooth    Soft blocked: no    Hard blocked: nojeroen@laptop ~ $ sudo rfkill unblock 5jeroen@laptop ~ $ sudo rfkill list0: phy0: Wireless LAN    Soft blocked: no    Hard blocked: no1: brcmwl-0: Wireless LAN    Soft blocked: no    Hard blocked: no4: hp-wifi: Wireless LAN    Soft blocked: no    Hard blocked: no5: hp-bluetooth: Bluetooth    Soft blocked: no    Hard blocked: no6: hci1: Bluetooth    Soft blocked: no    Hard blocked: no8: hci0: Bluetooth    Soft blocked: no    Hard blocked: no
Permanently disable built-in bluetooth and use USB
drivers;usb;bluetooth