Public bug reported:

The upstream kernel module brcmsmac claim there is support for BCM4313.
However, it isn't 100% yet (in Oneiric).  If the bcmwl package is
installed to support this device, the brcmsmac module should be
blacklisted.

Steps:
1. get laptop with BCM4313 and load the latest image on it (20120516-1)
2. step out to parking lot and view wireless networks that are available with 
nm-applet
3. blacklist bcma and brcmsmac modules (add 'blacklist brcmsmac' and 'blacklist 
bcma' in separate lines with out quotes to 
/etc/modprobe.d/blacklist-brcmsmac.conf)
4. reboot laptop
5. step out to parking lot and view wireless networks that are available with 
nm-applet

Expected results:
number of available wireless networks are the same in step 2 and 5

Actual results:
more wireless networks are available in step 5

** Affects: bcmwl (Ubuntu)
     Importance: High
     Assignee: Alberto Milone (albertomilone)
         Status: New


** Tags: blocks-hwcert-enablement

** Changed in: bcmwl (Ubuntu)
     Assignee: (unassigned) => Alberto Milone (albertomilone)

** Changed in: bcmwl (Ubuntu)
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/1006486

Title:
  [BCM4313] If bcmwl is installed, bcma and brcmsmac modules should be
  blacklisted

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