Comment 5 for bug 992757

Same here:

$ lsusb | grep Bluetooth
Bus 005 Device 003: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)

$ hciconfig
hci0: Type: BR/EDR Bus: USB
 BD Address: 00:00:00:00:00:00 ACL MTU: 0:0 SCO MTU: 0:0
 DOWN
 RX bytes:429 acl:0 sco:0 events:14 errors:0
 TX bytes:64 acl:0 sco:0 commands:16 errors:2

$ hcitool dev
Devices:

$ dmesg
[ 1746.528017] usb 5-2: new full-speed USB device number 3 using uhci_hcd
[ 1746.742044] usb 5-2: New USB device found, idVendor=0a12, idProduct=0001
[ 1746.742049] usb 5-2: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[ 1747.772011] Bluetooth: hci0 command tx timeout
[ 1748.772009] Bluetooth: hci0 command tx timeout