I'm running Arch linux on my laptop (dell inspiron 3437).

    $ uname -rm
    3.12.6-1-ARCH x86_64

On bootup, I sometimes get an error saying:
    Bluetooth: Error in firmware loading err = -110,len = 448, size = 4096
    Bluetooth: Loading patch file failed

If not, then it will be:
    usb 2-6: device not accepting address 3, error -71

From $ lsusb -t output: http://pastebin.com/zt4QxgNH, I can see that usb 2-6 is my bluetooth.

$ lspci output: http://pastebin.com/b6jT0UNn

$ lsusb -v output: http://pastebin.com/Fx58YZhw, as you can see it's an Atheros AR3011.

$ dmesg output when having bluetooth firmware loading error: http://pastebin.com/azLZfPu7

$ dmesg output when having usb not accepting address error: http://pastebin.com/aQmGJefm

Pls let me know if you guys need anything else, thanks!