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[Po-Hsu Lin <po-hsu.lin@xxxxxxxxxxxxx>]

I would say it's a false positive result with wpa-supplicant. 
As the downgraded version does not guaranteed to work with the latest broadcom driver.

Also, I tried again with the latest wpa-supplicant + latest broadcom driver and it works.
I am not sure what's going on here.

Since this system works fine on the last SRU cycle, I will switch to
that kernel (3.2.0-90.128) and give it a try.

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https://bugs.launchpad.net/bugs/1498743

Title:
  [BCM4313][14e4:4727] Unable to connect to the network with proprietary
  driver installed

Status in bcmwl package in Ubuntu:
  New
Status in wpasupplicant package in Ubuntu:
  New

Bug description:
  CID: 201103-7379 Dell Latitude E4310

  With bcmwl-kernel-source 6.30.223.248+bdcom-0ubuntu0.0.2 installed on this SRU system,
  the wireless network refuses to connect to any visible AP, you can see it failed to associate the request to the driver from syslog

  Sep 23 00:28:12 201103-7379 wpa_supplicant[1150]: Association request
  to the driver failed

  02:00.0 Network controller [0280]: Broadcom Corporation BCM4313 802.11bgn Wireless Network Adapter [14e4:4727] (rev 01)
  	Subsystem: Dell Inspiron M5010 / XPS 8300 [1028:0010]
  	Flags: bus master, fast devsel, latency 0, IRQ 17
  	Memory at 52c00000 (64-bit, non-prefetchable) [size=16K]
  	Capabilities: <access denied>
  	Kernel driver in use: wl
  	Kernel modules: wl, bcma, brcmsmac

  There was once a similar bug reported before (bug 1220504), but it can
  be fixed with deb file provided by Alberto (with driver version
  6.30.223.141+bdcom-0ubuntu1), I will switch back to this package to
  verify this again later.

  
  Note:
  This driver works on another SRU system, 201103-7380, running with BCM4313 [14e4:4727] as well, just with a little difference in the Subsystem:
  03:00.0 Network controller [0280]: Broadcom Corporation BCM4313 802.11bgn Wireless Network Adapter [14e4:4727] (rev 01)
  	Subsystem: Broadcom Corporation Device [14e4:051a]
  	Flags: bus master, fast devsel, latency 0, IRQ 17
  	Memory at d0300000 (64-bit, non-prefetchable) [size=16K]
  	Capabilities: <access denied>
  	Kernel driver in use: wl
  	Kernel modules: wl, bcma, brcmsmac

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: bcmwl-kernel-source 6.30.223.248+bdcom-0ubuntu0.0.2
  ProcVersionSignature: Ubuntu 3.2.0-91.129-generic 3.2.71
  Uname: Linux 3.2.0-91-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.0.1-0ubuntu17.9
  Architecture: amd64
  Date: Wed Sep 23 00:13:28 2015
  InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1)
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: bcmwl
  UpgradeStatus: No upgrade log present (probably fresh install)

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