Dell Inspiron 15-3521이 설치된 Ubuntu 14.04에서 Bluetooth가 작동하지 않음

Ubuntu 12.04가 사전 설치된 노트북 Dell inspiron 15-3521이 있습니다. 잘 작동했습니다 (이 Ubuntu를 제거했습니다). Ubuntu 14.04 (새로 설치)를 설치했습니다.

(설치 드라이버는 다음과 같습니다 bcmwl-kernel-source 6.30.223.141+bdcom-0ubuntu2)

WiFi 네트워크는 잘 작동하지만 Bluetooth는 작동하지 않습니다 (내 휴대폰, 다른 PC 및 랩톱에서 볼 수없고 내 랩톱에서는 아무것도 볼 수 없음).

Bluetooth 장치가 활성화되고 켜져 있고 표시됩니다.

lspci 결과:

00:00.0 Host bridge: Intel Corporation 3rd Gen Core processor DRAM Controller (rev 09)
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
00:14.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB xHCI Host Controller (rev 04)
00:16.0 Communication controller: Intel Corporation 7 Series/C210 Series Chipset Family MEI Controller #1 (rev 04)
00:1a.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #2 (rev 04)
00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 1 (rev c4)
00:1c.1 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 2 (rev c4)
00:1d.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation HM76 Express Chipset LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation 7 Series Chipset Family 6-port SATA Controller [AHCI mode] (rev 04)
00:1f.3 SMBus: Intel Corporation 7 Series/C210 Series Chipset Family SMBus Controller (rev 04)
01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 05)
02:00.0 Network controller: Broadcom Corporation BCM43142 802.11b/g/n (rev 01)

lsusb 결과:

Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub 
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub 
Bus 001 Device 005: ID 064e:8132 Suyin Corp. 
Bus 001 Device 004: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller 
Bus 001 Device 003: ID 0a5c:21d7 Broadcom Corp. BCM43142 Bluetooth 4.0
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 002: ID 19d2:0031 ZTE WCDMA Technologies MSM MF110/MF627/MF636
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub