Ubuntu: My bluetooth is disabled in Ubuntu 14.10



Question:

I have recently installed ubuntu 14.10 and found both wifi and bluetooth is not working. I could able to regain my wifi and bluetooth is still disabled. Please need some help. I have seen a lot of posts and found nothing which can resolve my issue.

hcitool dev -- output Devices:


Solution:1

Device needs firmware to work

wget https://www.dropbox.com/s/bor5hy8djhztpsf/fw-04ca_200b.hcd  sudo cp fw-04ca_200b.hcd /lib/firmware  sudo cp fw-04ca_200b.hcd /lib/firmware/brcm  

Reboot and try

Edit: wget https://www.dropbox.com/s/dnlvxmw5l7mwn2d/bluetooth.tar.gz

tar -zxvf bluetooth.tar.gz

It should create a folder named bluetooth to your home folder, then cd bluetooth And then we need to get some files downloaded sudo apt-get install linux-headers-generic build-essential

Now we copy files from your current config

cp /usr/src/linux-headers-$(uname -r)/Module.symvers Module.symvers

cp /boot/config-$(uname -r) .config

Now we can make the modules with

make -C /lib/modules/$(uname -r)/build M=$PWD modules

Now we unload the current module

sudo modprobe -r btusb and copy in the new one with

sudo cp btusb.ko /lib/modules/$(uname -r)/kernel/drivers/bluetooth/

And it is time to test and insert the module sudo modprobe btusb and with any luck your bluetooth works fine, if not a reboot should work.

If you update and find bluetooth doesn't work after a reboot then cd bluetooth

make -C /lib/modules/$(uname -r)/build M=$PWD clean  cp /usr/src/linux-headers-$(uname -r)/Module.symvers Module.symvers  cp /boot/config-$(uname -r) .config  make -C /lib/modules/$(uname -r)/build M=$PWD modules  sudo modprobe -r btusb  sudo cp btusb.ko /lib/modules/$(uname -r)/kernel/drivers/bluetooth/  sudo modprobe btusb  


Solution:2

iam using lenovo u430. Below are the output each command.

lspci -nnk | grep -iA2 net 01:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 10) Subsystem: Lenovo Device [17aa:3801] Kernel driver in use: r8169 02:00.0 Network controller [0280]: Broadcom Corporation BCM4352 802.11ac Wireless Network Adapter [14e4:43b1] (rev 03) Subsystem: Lenovo Device [17aa:062e] Kernel driver in use: wl

lsusb

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 004: ID 04ca:200b Lite-On Technology Corp. Bus 002 Device 003: ID 5986:0538 Acer, Inc Bus 002 Device 002: ID 04f3:0060 Elan Microelectronics Corp. Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

rfkill list all

0: phy0: Wireless LAN Soft blocked: no Hard blocked: no 1: brcmwl-0: Wireless LAN Soft blocked: no Hard blocked: no 2: ideapad_wlan: Wireless LAN Soft blocked: no Hard blocked: no 3: ideapad_bluetooth: Bluetooth Soft blocked: no Hard blocked: no


Solution:3

dmesg | grep -i bluetooth [ 9.247823] Bluetooth: Core ver 2.19 [ 9.247843] Bluetooth: HCI device and connection manager initialized [ 9.247851] Bluetooth: HCI socket layer initialized [ 9.247853] Bluetooth: L2CAP socket layer initialized [ 9.247864] Bluetooth: SCO socket layer initialized [ 9.251480] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 9.251483] Bluetooth: BNEP filters: protocol multicast [ 9.251490] Bluetooth: BNEP socket layer initialized [ 9.251945] Bluetooth: RFCOMM TTY layer initialized [ 9.251953] Bluetooth: RFCOMM socket layer initialized [ 9.251958] Bluetooth: RFCOMM ver 1.11

dmesg | grep -i firmware [ 0.180970] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored


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