I have just tested v3.14-rc6-trusty from mainline kernel and the issue seems to have been fixed.
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.14-rc6-trusty/ ** Tags added: kernel-fixed-upstream -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1245150 Title: 0a12:0001 Bluetooth Dongle (Cambridge Silicon Radio, Ltd) doesn't work after upgrading to Saucy To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1245150/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs