Broadcom 4313 (14e4:4727) acts up 14.04

[Hadaka]

@exsencon here is a good guide to hep you with your wireless problem
http://ubuntuforums.org/showthread.php?t=2214110
your card is not the same as this thread, i would suggest you start a new
thread for your issue. your card is very easy to get working properly
and the above link should be all you need, if however you need help
let us know.
thanks.

[Rob Sayer]

Since the 'bcma' driver has become a dependency of "brcmsmac" also, I have been seeing something that I personally consider a bug - the loading of "b43" with this particular card. So far, this is my understanding - the correct driver - brcmsmac loads 'bcma' as its dependency, then 'bcma' loads 'b43' as has been doing for years. Now loading of both brcmsmac and b43 creates a conflict situation.

Fortunately, the solution is very easy - just blacklist the "b43" and "ssb" drivers. A single command to do that is -

echo -e "blacklist b43\nblacklist ssb" | sudo tee -a /etc/modprobe.d/blacklist.conf

On next boot, the b43 driver won't load, only brcmsmac will. To confirm that -

lsmod | egrep 'b43|ssb|brcm'

..the output should only be "brcmsmac" and its supporting drivers. No b43 or ssb.

OK, I tried that just now ... it still works. Can't tell if it's any better or not but it's at least as good. Result of the 2nd command:

lsmod | egrep 'b43|ssb|brcm'brcmsmac              529837  0 
cordic                 12518  1 brcmsmac
brcmutil               15066  1 brcmsmac
mac80211              546051  1 brcmsmac
cfg80211              409394  2 brcmsmac,mac80211
bcma                   42043  2 brcmsmac

I'll definitely mark this <solved> after some more use if it doesn't bork ...

Thanks for the responses.

[Rob Sayer]

I am very happy I am not the only guy having problems with wireless and Ubuntu.
I have a broadcom 4311 802.11b/g 14e4:4311(rev 01) card on my Dell Inspiron 1501 laptop and up to Ubuntu 10.10 I always got very good wireless and even didn't have much to do to get it. It was just there-period.Now with the later Ubuntu's there seems to be a problem. So I tried slackware, Centos and Mepis and even Sabayon and got a good wireless in no time.
Now, simple question: Why is it so difficult to get a wireless with Ubuntu now (and Mint for that matter)? They are supposed to be mainstream Linuxes. In the meantime I am still happy with Ubuntu 10.10 and...Slackware!

My current ubuntu kernel version in 14.04 is 3.13.0-32, which is based on the 3.13.4 mainline according to this ...

http://people.canonical.com/~kernel/...rsion-map.html

The slackware 14.0 kernel version according to this ...

http://www.slackware.com/announce/14.0.php

... is 3.2.29. That's pretty old. I guess that's why it's often recommended for ancient hardware.

SO I guess the point I'm trying to make is: don't blame ubuntu because you can't be bothered to try to get proper support.

Of course, you can't get support for ubuntu 10.whatever anymore ...

[Rob Sayer]

OK ... I've been using this for a while now and used 2 different hotspots. Sunday morning coffee. It works fine.

This message:

Support for cores revisions 0x17 and 0x18 disabled by module param allhwsupport=0. Try b43.allhwsupport=1

appeared on boot before. It's not there anymore.

I'm going to mark this <solved>.

Thanks all.

[Hadaka]

GREAT ! Glad you got it working.