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[Arun kumar <arunsori94@xxxxxxxxx>]

I've this version of the driver (https://launchpad.net/ubuntu/wily/amd64/bcmwl-kernel-source/6.30.223.248+bdcom-0ubuntu7) installed on dell inspiron 5520 which has same BCM43142 WIFI adapter. I'm having the same problem with the latest version of the package installed on ubuntun 15.10. 
Followed recommendations to fix wifi adapter to a fixed Access Point but still it is roaming and gets disconnected after an interval of time.
Any updates on this ?

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https://bugs.launchpad.net/bugs/1415880

Title:
  14e4:4365 bcmwl-kernel source: fix for null pointer crash

Status in Dell Sputnik:
  Confirmed
Status in bcmwl package in Ubuntu:
  Fix Released
Status in bcmwl source package in Precise:
  Fix Committed
Status in bcmwl source package in Trusty:
  Fix Committed
Status in bcmwl source package in Vivid:
  Fix Committed
Status in bcmwl source package in Wily:
  Fix Released

Bug description:
  [Impact]

   * bcmwl does not compile on new kernels (or HWE kernels)
   * bcmwl suffers from null reference bug 

  [Test Case]

   * public PPA provided to community and feedback
   * based on patch available to other distros
   * comment #42

  [Regression Potential]

   * for changes on kernel support it may not compile (tested with 3.2, 3.13, 3.18 and 4.2)
   * for the null reference change -> proved to fix problem for community based on feedback

  [Other Info]

  Original bug description:

  The bcmwl package as of now misses one patch for a bug that occurs
  with BCM43142 and possibly other broadcom chipsets that will look like
  random disconnects, poor wifi signal and kernel warnings, See also
  #1379524.

  Adding the patch is a fairly simple process:

  * put the patch file in /usr/src/bcmwl-6.30.223.248+bdcom/patches
  * add the following line to  /usr/src/bcmwl-6.30.223.248+bdcom/dkms.conf
  PATCH[7]="0014-null-pointer-crash.patch"
  * run: /usr/lib/dkms/common.postinst bcmwl 6.30.223.248+bdcom /usr/share/bcmwl x86_64 $(uname -r)

  This has fixed the issue for me. Edit: I just wanted to add that I did
  not write the patch; I merely downloaded it from a paste that was
  linked from the respective AUR package.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: bcmwl-kernel-source 6.30.223.248+bdcom-0ubuntu1 [modified: usr/src/bcmwl-6.30.223.248+bdcom/dkms.conf]
  ProcVersionSignature: Ubuntu 3.16.0-29.39-generic 3.16.7-ckt2
  Uname: Linux 3.16.0-29-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.14.7-0ubuntu8.1
  Architecture: amd64
  CurrentDesktop: LXDE
  Date: Thu Jan 29 13:15:17 2015
  InstallationDate: Installed on 2015-01-26 (3 days ago)
  InstallationMedia: Lubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
  SourcePackage: bcmwl
  UpgradeStatus: No upgrade log present (probably fresh install)

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