@Rafael, The linux-generic-lts-utopic kernel does not work for me too.
$ sudo apt-get install linux-generic-lts-utopic <reboot> $ uname -a Linux soni 3.16.0-28-generic #38-Ubuntu SMP Sat Dec 13 16:13:28 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux $ lsb_release --all No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 14.04.1 LTS Release: 14.04 Codename: trusty $ apt-cache policy linux-generic-lts-utopic linux-generic-lts-utopic: Installed: 3.16.0.28.21 Candidate: 3.16.0.28.21 Version table: *** 3.16.0.28.21 0 500 http://archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages 500 http://archive.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages 100 /var/lib/dpkg/status $ lsusb | grep Bluetooth Bus 001 Device 003: ID 045e:0745 Microsoft Corp. Nano Transceiver v1.0 for Bluetooth Bus 003 Device 002: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode) $ hciconfig hci0: Type: BR/EDR Bus: USB BD Address: 00:1B:10:00:2A:EC ACL MTU: 1017:8 SCO MTU: 64:0 DOWN RX bytes:494 acl:0 sco:0 events:20 errors:0 TX bytes:75 acl:0 sco:0 commands:20 errors:0 $ hcitool scan Device is not available: No such device -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1221995 Title: 0a12:0001 Bluetooth Dongle (Cambridge Silicon Radio, Ltd) doesn't work with 3.11 or 3.13 kernels To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1221995/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs