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[Bug 1439503] Re: 14e4:4331 [MacBookPro9, 2] 41%+ packet loss


** Tags added: saucy

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  14e4:4331 [MacBookPro9,2] 41%+ packet loss

Status in Broadcom 802.11 Linux STA driver:
Status in bcmwl package in Ubuntu:

Bug description:
  Computer is suffering unusually high packet loss (41%+) with 802.11n through a Verizon Jetpack MiFi 5510L (latest router firmware). I tried turning off WiFi power management via sudo iwconfig wlan1 power off (I found it enabled), but no change. Other WiFi hardware (cell phones, etc.), and other/same operating systems don't have this problem. This occurs with the release kernel in Utopic, and well as latest:
  uname -a
  Linux macbookpro 3.16.0-33-generic #44-Ubuntu SMP Thu Mar 12 12:19:35 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

  apt-cache policy bcmwl-kernel-source
    Version table:
   *** 0
          500 http://us.archive.ubuntu.com/ubuntu/ utopic/restricted amd64 Packages
          100 /var/lib/dpkg/status

  lspci -vvnn | grep -A 9 Network
  02:00.0 Network controller [0280]: Broadcom Corporation BCM4331 802.11a/b/g/n [14e4:4331] (rev 02)
  	Subsystem: Apple Inc. AirPort Extreme [106b:00f5]
  	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: 256 bytes
  	Interrupt: pin A routed to IRQ 17
  	Region 0: Memory at a0600000 (64-bit, non-prefetchable) [size=16K]
  	Capabilities: <access denied>
  	Kernel driver in use: wl

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: bcmwl-kernel-source
  ProcVersionSignature: Ubuntu 3.16.0-33.44-generic 3.16.7-ckt7
  Uname: Linux 3.16.0-33-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.14.7-0ubuntu8.2
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Wed Apr  1 23:53:47 2015
  InstallationDate: Installed on 2015-04-01 (0 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
  SourcePackage: bcmwl
  UpgradeStatus: No upgrade log present (probably fresh install)

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