le bluetooth est désactivé sur mon ubuntu 14.04

Bonjour, s'il vous plaît aidez les gars je ne peux pas activer la dent bleue dans mon ordinateur portable.

user@spider-king:~$ lspci -knn | grep Net -A2; lsusb; uname -a
02:00.0 Network controller [0280]: Broadcom Corporation BCM43142 802.11b/g/n [14e4:4365] (rev 01)
    Subsystem: Lenovo Device [17aa:0621]
    Kernel driver in use: wl
    Bus 001 Device 002: ID 8087:8000 Intel Corp. 
    Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
    Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
    Bus 002 Device 005: ID 105b:e065  
    Bus 002 Device 004: ID 174f:14b2 Syntek 
    Bus 002 Device 003: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
    Bus 002 Device 002: ID 04ca:0061 Lite-On Technology Corp. 
    Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
    Linux spider-king 3.16.0-57-generic #77~14.04.1-Ubuntu SMP Thu Dec 17 23:20:00 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux