Comment 11 for bug 863799

I'm also having problems with ad hoc network with my BCM4313 on my Compaq Presario CQ42. I have tried Brian's workaround and it does not work. I attemtped to make and install the latest Network Manager applet 0.9.1.90 which created GTK2 and GTK3 conflicts so I had to uninstall it. The furthest I got was joining an ad hoc network for 30 seconds and then disconnecting. This happened once only after adding Brian's workaround. Unfortunately I do not know Ubuntu well enough to identify which are open-source drivers and which are restricted. My blacklist.conf file reads:

# replaced by b43 and ssb.
 blacklist bcm43xx

# this is taken from the broadcom-sta-common.conf file
# wl module from Broadcom conflicts with ssb
# We must blacklist the following modules:
 blacklist b44
 blacklist b43legacy
 blacklist b43
 blacklist brcm80211
 blacklist brcmsmac
 blacklist ssb
 install wl /sbin/modprobe --ignore-install wl $CMDLINE_OPTS

# Brian Teague's fix as per https://bugs.launchpad.net/ubuntu/+source/linux/+bug/863799
blacklist bcma
blacklist brcmsmac
blacklist brcmutil

And an automated blacklist blacklist-bcm43.conf file has been automatically created:
# Warning: This file is autogenerated by bcmwl. All changes to this file will be lost.
blacklist b43
blacklist b43legacy
blacklist ssb
blacklist bcm43xx
blacklist brcm80211