Comment 31 for bug 192720

darkmatter14B : I have the same machine with you and I have solved the problem by edit /etc/modprobe.d/blacklist; blacklist bcm43xx and b43 legacy, as follows:

# replaced by b43 and ssb.
blacklist bcm43xx
blacklist b43legacy

if you can't boot the system to edit it, you could use a knoppix's liveCD to boot and then remount the hda1 (in mode rw) then edit /media/hda1/etc/modprobe.d/blacklist

the solution can solve the problem but you can't use the b43legacy driver, it isn't problem for me because I use a D-Link usb wifi which use rt73 driver