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gunjan parashar
Asked: 2015-01-03 01:36:35 +0800 CST

bluetooth not working in lenovo B40-70?

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Bluetooth is not detected in lenovo b40-70 laptop in ubuntu 14.04. I have tried installing bluetooth manager and it shows bluetooth adapter not found.

My lsusb output:

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 138a:0011 Validity Sensors, Inc. VFS5011 Fingerprint Reader  
Bus 002 Device 003: ID 0cf3:3004 Atheros Communications, Inc.   
Bus 002 Device 002: ID 5986:0652 Acer, Inc   
Bus 002 Device 005: ID 12d1:1f01 Huawei Technologies Co., Ltd.   
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

I have also tried rfkill unblock all but nothing works... I do not want to switch to windows again as this laptop is giving me hell of a problems and this is one among them.

14.04

1 Answers

  1. Best Answer

    First thing you may need to do is

    sudo apt-get install linux-firmware

    I have one of these BT devices on my Lenovo and they can be difficult with firmware uploading to early during boot so please try the following

    echo "blacklist ath3k" | sudo tee /etc/modprobe.d/ath3k.conf

    Then edit /etc/rc.local

    sudo gedit /etc/rc.local

    And add the following above exit 0, as exit 0 must be the last line in the file

    sleep 20
modprobe ath3k

    save, exit program, and reboot

    EDIT:A new kernel was released today that fixed the issue without the blacklist or the edits in rc.local. http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.19.1-vivid/ check arch to see if you have 32 or 64 bit system You can delete the blacklist with sudo rm /etc/modprobe.d/ath3k.conf and use gksudo gedit /etc/rc.local and delete the sleep line and

    modprobe ath3k

    Save, exit program

    For 32 bit, download and install

    http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.19.1-vivid/linux-headers-3.19.1-031901_3.19.1-031901.201503080052_all.deb

    http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.19.1-vivid/linux-headers-3.19.1-031901-generic_3.19.1-031901.201503080052_i386.deb

    http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.19.1-vivid/linux-image-3.19.1-031901-generic_3.19.1-031901.201503080052_i386.deb

    For 64 bit

    http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.19.1-vivid/linux-headers-3.19.1-031901_3.19.1-031901.201503080052_all.deb

    http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.19.1-vivid/linux-headers-3.19.1-031901-generic_3.19.1-031901.201503080052_amd64.deb

    http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.19.1-vivid/linux-image-3.19.1-031901-generic_3.19.1-031901.201503080052_amd64.deb

    I don't have hybrid graphics so I don't know if this kernel will cause problems

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