I am seeing users of 18.04 report a different error for the same AR3012 hardware. I'm going to assume it's the same problem, just a newer kernel:
[ 22.402475] Bluetooth: hci0: don't support firmware rome 0x31010000
and
[ 228.109562] Bluetooth: hci0: don't support firmware rome 0x1020200
[ 18.722951] Bluetooth: hci0: don't support firmware rome 0x11020000
I am seeing users of 18.04 report a different error for the same AR3012 hardware. I'm going to assume it's the same problem, just a newer kernel:
[ 22.402475] Bluetooth: hci0: don't support firmware rome 0x31010000
and
[ 228.109562] Bluetooth: hci0: don't support firmware rome 0x1020200
and
[ 18.722951] Bluetooth: hci0: don't support firmware rome 0x11020000