I have a laptop Dell inspiron 15-3521 with Ubuntu 12.04 pre-installed, It was working good (I removed this Ubuntu).
I installed Ubuntu 14.04 (fresh install).
(The driver installed is: bcmwl-kernel-source 6.30.223.141+bdcom-0ubuntu2
)
The WiFi network working good but Bluetooth is not working (My phone, other pc and laptop can't see it and my laptop can't see anything.)
Bluetooth device is enabled and turned on and visible.
lspci
result:
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
result:
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
Best Answer
Unfortunately, your Bluetooth device:
Is not supported by any version of stock Ubuntu, please refer to
Bug1129865 [Broadcom Combo BT/Wifi Card] 21D3 21D7 Bluetooth does not detect anything at all
(The reason is listed in comment #7)
And I will suggest you to subscribe to this bug:
Bug 1065400 Support for loading Broadcom bluetooth firmware
There might be a workaround in that thread, good luck!