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[Rostislav Kandilarov <rostislav.kandilarov@xxxxxxxxx>]

I've checked at https://help.ubuntu.com/community/WifiDocs/Driver/bcm43xx and installed b43 driver:
sudo apt-get install firmware-b43-installer
 which up to now seems to work with my BCM4311. So I would recommend  KDE driver manager NOT to recommend bcmwl but b43 for BCM4311 (Broadcom Corporation BCM4311 802.11b/g WLAN [14e4:4311]).

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https://bugs.launchpad.net/bugs/1407522

Title:
  bcmwl package was sugested by KDE driver manager but broke the system

Status in bcmwl package in Ubuntu:
  Incomplete

Bug description:
  On fresh 14.10 install on the first GUI run in KDE the KDE Driver
  Manager suggested installation of bcmwl-kernel-source (see attached
  screenshot)for my Broadcom Corporation BCM4311. After successful
  installation of the package and restart, my system got

  Jan  4 23:32:13 Beatles kernel: [   19.485177] wl driver 6.30.223.248 (r487574) failed with code 21
  Jan  4 23:32:13 Beatles kernel: [   19.485208] ------------[ cut here ]------------
  Jan  4 23:32:13 Beatles kernel: [   19.485242] kernel BUG at include/net/cfg80211.h:3343!

  full description of the message in attached file
  (syslog_extracted.log).

  For some reason this also affects the driver for my NIC  and my laptop
  got out of any possible network connection. So instead of configuring
  the wireless card it left me with only "lo" interface :(. I would
  expect properly configured modules for WAN and LAN....

  Luckily  
  apt-get remove --purge bcmwl-kernel-source 
  restores the previous state so I can submit this bug via LAN.

  Now I'm running  Ubuntu 14.10  but the same happened half an year ago
  when I tried to install 14.04 on this laptop.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: bcmwl-kernel-source (not installed)
  ProcVersionSignature: Ubuntu 3.16.0-28.38-generic 3.16.7-ckt1
  Uname: Linux 3.16.0-28-generic x86_64
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: amd64
  CurrentDesktop: KDE
  Date: Mon Jan  5 01:00:26 2015
  SourcePackage: bcmwl
  UpgradeStatus: No upgrade log present (probably fresh install)

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