b43 driver without any options knocks out bluetooth slackware64 14.0
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lspci for the wifi controller:
0c:00.0 Network controller: Broadcom Corporation BCM4312 802.11b/g LP-PHY (rev 01)
lsusb for the bluetooth contrller:
Bus 003 Device 005: ID 413c:8160 Dell Computer Corp. Wireless 365 Bluetooth
load the b43 driver with the "btcoex=0" option.
The way I did this was to blacklist the b43 driver via a file /etc/modprobe/b43.conf that contained "blacklist b43" on one line. Then went into /etc/rc.d/rc.modules and added a line at the end "/sbin/modprobe b43 -v btcoex=0". There should be a way to do this with udev rules, but I'm not that familiar with udev yet.
The bcm4312 doubled as a combination bluetooth+wifi adapter. To use it effectively you have to use the proprietary driver from Broadcom, the wl (broadcom-sta) driver, rather than the standard kernel b43 driver with the b43 firmware.
Follow the instructions here to use the provided scripts to build and install the driver for your system: