My bluetooth of Dell Inspiron 3521 running Ubuntu 16.04 LTS is always turned off and never working.
Output of rfkill list is:
phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
brcmwl-0: Wireless LAN
Soft blocked: no
Hard blocked: no
hci0: Bluetooth
Soft blocked: no
Hard blocked: no
The output for dmesg | grep -i bluetooth is surprisingly too long, but the
starting lines are:
[ 13.604878] Bluetooth: Core ver 2.21
[ 13.604893] Bluetooth: HCI device and connection manager initialized
[ 13.604897] Bluetooth: HCI socket layer initialized
[ 13.604899] Bluetooth: L2CAP socket layer initialized
[ 13.604903] Bluetooth: SCO socket layer initialized
[ 16.255339] Bluetooth: hci0 command 0x1001 tx timeout
[ 24.251910] Bluetooth: hci0: BCM: Reading local version info failed (-110)
[ 24.260749] Bluetooth: hci0: BCM: chip id 70
[ 24.276755] Bluetooth: hci0: BCM43142A
[ 24.276761] Bluetooth: hci0: BCM (001.001.011) build 0000
[ 24.435842] bluetooth hci0: Direct firmware load for brcm/BCM.hcd failed with error -2
[ 24.435879] Bluetooth: hci0: BCM: Patch brcm/BCM.hcd not found
[ 29.649634] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 29.649640] Bluetooth: BNEP filters: protocol multicast
[ 29.649645] Bluetooth: BNEP socket layer initialized
[ 807.637085] Bluetooth: hci0 command 0x1001 tx timeout
[ 815.628818] Bluetooth: hci0: BCM: Reading local version info failed (-110)
[ 815.636981] Bluetooth: hci0: BCM: chip id 70
[ 815.652959] Bluetooth: hci0: BCM43142A
[ 815.652974] Bluetooth: hci0: BCM (001.001.011) build 0000
[ 815.653017] bluetooth hci0: Direct firmware load for brcm/BCM.hcd failed with error -2
[ 815.653023] Bluetooth: hci0: BCM: Patch brcm/BCM.hcd not found
