File README.hci_usb of Package hci_usb

README.hci_usb:
---------------
hci_usb is the old and deprecated driver module for USB Bluetooth
dongles. If you have problems with the newer "btusb" driver, you
can install this package and load hci_usb. You should, however, file
a bug against btusb. Please note that the hci_usb driver is known to
be broken and to e.g. corrupt memory in some circumstances. So do not
report any kernel bugs with this driver in use.

The loading of hci_usb is by default disabled, even with this package
installed. To enable hci_usb and disable btusb, edit the file 
/etc/modprobe.d/hci_usb (read the comments in there).

Have a lot of fun...