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[Oleg Shmelev <1379524@xxxxxxxxxxxxxxxxxx>]

My WiFI disconnected once again just a minute ago and here's what I found in dmesg right after it disconnected
$ dmesg
[13868.961515] cfg80211: Calling CRDA to update world regulatory domain
[13868.967287] cfg80211: World regulatory domain updated:
[13868.967297] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[13868.967303] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[13868.967308] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[13868.967311] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[13868.967314] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[13868.967317] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[13868.967796] cfg80211: Calling CRDA for country: RU
[13868.970836] cfg80211: Regulatory domain changed to country: RU
[13868.970840] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[13868.970842] cfg80211:   (2402000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm)
[13868.970844] cfg80211:   (5735000 KHz - 5835000 KHz @ 20000 KHz), (N/A, 3000 mBm)
[13871.118092] cfg80211: Calling CRDA for country: RU
[13871.123036] cfg80211: Regulatory domain changed to country: RU
[13871.123041] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[13871.123045] cfg80211:   (2402000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm)
[13871.123047] cfg80211:   (5735000 KHz - 5835000 KHz @ 20000 KHz), (N/A, 3000 mBm)
[13876.690454] cfg80211: Calling CRDA to update world regulatory domain
[13876.692717] cfg80211: World regulatory domain updated:
[13876.692720] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[13876.692722] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[13876.692723] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[13876.692724] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[13876.692725] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[13876.692726] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[13876.692841] cfg80211: Calling CRDA for country: RU
[13876.694730] cfg80211: Regulatory domain changed to country: RU
[13876.694732] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[13876.694734] cfg80211:   (2402000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm)
[13876.694735] cfg80211:   (5735000 KHz - 5835000 KHz @ 20000 KHz), (N/A, 3000 mBm)
[13878.828279] cfg80211: Calling CRDA for country: RU
[13878.833279] cfg80211: Regulatory domain changed to country: RU
[13878.833288] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[13878.833292] cfg80211:   (2402000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm)
[13878.833296] cfg80211:   (5735000 KHz - 5835000 KHz @ 20000 KHz), (N/A, 3000 mBm)
____________________________________________________

I'm not sure what is happening and how to fix this. Any helpful advice
would be really appreciated.

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Packages, which is subscribed to bcmwl in Ubuntu.
https://bugs.launchpad.net/bugs/1379524

Title:
  Weak wifi signal and bluetooth missing firmware

Status in “bcmwl” package in Ubuntu:
  Confirmed

Bug description:
  On a fresh install of Ubuntu 14.04 on my new HP Pavilion 15-020ng with
  Broadcom BCM43142 hybrid wifi/bluetooth chipset the official driver
  from Broadcom does not work correctly. On 2.4 GHz the wifi signal is
  so low that the connection is interrupted on a regular basis (network
  manager shows 26 Mb/s), other devices (notebook, tablet) do have a
  normal signal at the same position and even this laptop has a good
  signal with Windows 7 (Dual-Boot).

  In addition, Bluetooth does not work because the driver reports
  missing firmware but there does not seem to be official firmware
  available anywhere.

  The exact device name:
  08:00.0 Network controller [0280]: Broadcom Corporation BCM43142 802.11b/g/n [14e4:4365] (rev 01)

  The 5 Ghz frequency seems to be not supported by the driver according
  to the README file and does not work at all. My router is set to use
  WPA2-PSK with AES, which is the only possible option besides WPA or
  WPA/WPA2-mixed.

  I am using the official wl driver that was installed by default, also
  tried reinstalling via "sudo apt-get install bcmwl-kernel-source
  --reinstall" without improvement and "sudo iwconfig wlan0 power off".
  Also blacklisted b43, brcmsmac and bcma as suggested by "Linux
  Wireless".

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: bcmwl-kernel-source 6.30.223.141+bdcom-0ubuntu2
  ProcVersionSignature: Ubuntu 3.13.0-37.64-generic 3.13.11.7
  Uname: Linux 3.13.0-37-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.14.1-0ubuntu3.5
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Thu Oct  9 23:04:07 2014
  InstallationDate: Installed on 2014-09-27 (12 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  SourcePackage: bcmwl
  UpgradeStatus: No upgrade log present (probably fresh install)

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