Removing stubborn modules

Solution 1:

When you do an lsmod, what is the reference count for the bluetooth module? Also,

lsmod | grep "bluetooth"

just to make sure there aren't other dependencies that may have been missed.

Eject modules in the following order:

rmmod bnep
rmmod hidp
rmmod rfcomm
rmmod l2cap

Then try

rmmod bluetooth
lsmod

What about disabling the module in /etc/modprobe.conf or blacking listing under /etc/modprobe.d/blacklist and then just rebooting?

Does something map to a /dev device and you could use lsof on that?

I think you have already tried the normal options...