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[n0dwis <n0dwis@xxxxxxxxxx>]

Problem solved by build module wl.ko from sources from broadcom site
(http://www.broadcom.com/support/802.11/linux_sta.php). I just manually
replace old module wl.ko to new.

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https://bugs.launchpad.net/bugs/1405074

Title:
  Low wifi signal level

Status in bcmwl package in Ubuntu:
  New

Bug description:
  My notebook HP Pavilion p170nr has very poor wi-fi receiving. Even
  near wi-fi router it shows about half of indicator level. On Windows
  8.1 everyting work fine.

  sudo lspci -vvnn | grep -A 9 Network
  08:00.0 Network controller [0280]: Broadcom Corporation BCM43142 802.11b/g/n [14e4:4365] (rev 01)
  	Subsystem: Hewlett-Packard Company Device [103c:2230]
  	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
  	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
  	Latency: 0, Cache Line Size: 64 bytes
  	Interrupt: pin A routed to IRQ 18
  	Region 0: Memory at b5500000 (64-bit, non-prefetchable) [size=32K]
  	Capabilities: [40] Power Management version 3
  		Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
  		Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=2 PME-

  lsb_release -rd
  Description:	Ubuntu 14.04.1 LTS
  Release:	14.04

  uname -a
  Linux black-pavilion 3.13.0-43-generic #72-Ubuntu SMP Mon Dec 8 19:35:06 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

  sudo dmidecode -s bios-version
  F.12

  sudo dmidecode -s bios-release-date
  08/18/2014

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: bcmwl-kernel-source 6.30.223.141+bdcom-0ubuntu2
  ProcVersionSignature: Ubuntu 3.13.0-43.72-generic 3.13.11.11
  Uname: Linux 3.13.0-43-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.14.1-0ubuntu3.6
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Tue Dec 23 09:53:18 2014
  InstallationDate: Installed on 2014-11-23 (29 days ago)
  InstallationMedia:
   
  SourcePackage: bcmwl
  UpgradeStatus: No upgrade log present (probably fresh install)

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