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[Launchpad Bug Tracker <1039205@xxxxxxxxxxxxxxxxxx>]

[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

** Changed in: linux (Ubuntu)
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1039205

Title:
  8086:4238 iwlwifi lost connections and poor performance with mixed
  networks

Status in “linux” package in Ubuntu:
  Expired

Bug description:
  Potential duplicate of
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/836250 .

  For the last few months I have been unable to use most wireless
  networks with my machine.   My machine is an HP Elitebook 8540w which
  as a Ultimate-N 6300 wifi card.  I cannot pinpoint exactly when the
  issue started as most of the networks which I normally use (at home
  and work) seem to work fine most of the time, but as I use other
  networks I realize that they are the exception rather than the rule.

  My home network  has a TPlink tl-wr1043nd router, which has worked
  quite well since I got the router.  A few weeks ago though I got the
  "iwlwifi 0000:03:00.0: Queue 11 stuck for 2000 ms." message in dmesg
  after a few seconds of passing data and would be unable to pass any
  more data until I unloaded and reloaded the iwlwifi module.  After
  fooling around with my machine for a while I rebooted my router and
  things returned to normal.  All other users on my network were using
  it just fine, but it was non-op with my machine.

  This past week I was traveling so I was connecting to various airport, hotel and cafe networks.  In general most of them did not work.  Reloading the module would allow them to start working again but generally the failure would occur anywhere from a few seconds to ten minutes later and stop packets from flowing.  Each time I would get a dmesg like this right as the link stopped passing traffic:
  Aug 15 23:40:19 jpeverill-lappy kernel: [287626.472664] iwlwifi 0000:44:00.0: Tx aggregation enabled on ra = 68:7f:74:24:b5:65 tid = 0
  Aug 15 23:40:22 jpeverill-lappy kernel: [287629.536823] wlan1: no IPv6 routers present
  Aug 15 23:40:52 jpeverill-lappy kernel: [287659.524086] iwlwifi 0000:44:00.0: Queue 11 stuck for 2000 ms.
  Aug 15 23:40:52 jpeverill-lappy kernel: [287659.524092] iwlwifi 0000:44:00.0: Current read_ptr 202 write_ptr 207
  Aug 15 23:40:52 jpeverill-lappy kernel: [287659.524096] iwlwifi 0000:44:00.0: On demand firmware reload
  Aug 15 23:40:52 jpeverill-lappy kernel: [287659.524774] ieee80211 phy0: Hardware restart was requested
  Aug 15 23:40:52 jpeverill-lappy kernel: [287659.524854] iwlwifi 0000:44:00.0: L1 Disabled; Enabling L0S
  Aug 15 23:40:52 jpeverill-lappy kernel: [287659.525045] iwlwifi 0000:44:00.0: Radio type=0x0-0x3-0x1

  I will list some of the things I tried and their results:

  I disabled network-manager and connected to the networks using
  wpa_supplicant from the command line.  This did not improve usability
  although I was able to monitor the connection status more closely so I
  did most of my testing this way.

  I tried to use wd_disable=1 module parameter.  This did not improve
  the usability but it did make reloading the module inoperative at
  bringing the card back.  I would have to reboot the machine to bring
  it back up.

  I updated to the 3.2.0-29-generic kernel (from -27) but saw no change.

  I tried installing linux-backports-modules-cw-29, no improvement.
  Actually after more sustained use it seemed worse with compat-wireless
  installed, and I experienced a hard system crash at one point.

  I am back home from travelling now so unfortunately I don't have
  access to known non-working networks as easily, but I can try anything
  desired.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-29-generic 3.2.0-29.46
  ProcVersionSignature: Ubuntu 3.2.0-29.46-generic 3.2.24
  Uname: Linux 3.2.0-29-generic x86_64
  NonfreeKernelModules: nvidia
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu12
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  jpeverill   2394 F.... pulseaudio
   /dev/snd/controlC0:  jpeverill   2394 F.... pulseaudio
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xd7520000 irq 62'
     Mixer name	: 'IDT 92HD75B3X5'
     Components	: 'HDA:111d7603,103c1521,00100202'
     Controls      : 19
     Simple ctrls  : 10
  Card1.Amixer.info:
   Card hw:1 'NVidia'/'HDA NVidia at 0xd3000000 irq 17'
     Mixer name	: 'Nvidia GPU 0d HDMI/DP'
     Components	: 'HDA:10de000d,10de0101,00100100'
     Controls      : 24
     Simple ctrls  : 4
  Date: Mon Aug 20 15:48:39 2012
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=225ce4fd-7e06-4c7c-937f-821d810a7487
  MachineType: Hewlett-Packard HP EliteBook 8540w
  PccardctlStatus:
   Socket 0:
     3.3V
    16-bit
    PC Card
     Subdevice 0 (function 0) bound to driver "pata_pcmcia"
  ProcEnviron:
   SHELL=/bin/bash
   TERM=xterm
   PATH=(custom, user)
   LANG=en_US.UTF-8
   LANGUAGE=en_US:en
  ProcFB:

  ProcKernelCmdLine: root=UUID=4a4cfeb0-ad39-4293-bcaf-000d6538b550 ro pcie_aspm=force pci=acpi quiet splash
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-29-generic N/A
   linux-backports-modules-3.2.0-29-generic  N/A
   linux-firmware                            1.79
  SourcePackage: linux
  StagingDrivers: mei
  UpgradeStatus: Upgraded to precise on 2012-05-03 (109 days ago)
  WifiSyslog:

  WpaSupplicantLog:

  dmi.bios.date: 09/07/2011
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: 68CVD Ver. F.20
  dmi.board.name: 1521
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: KBC Version 32.34
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvr68CVDVer.F.20:bd09/07/2011:svnHewlett-Packard:pnHPEliteBook8540w:pvr:rvnHewlett-Packard:rn1521:rvrKBCVersion32.34:cvnHewlett-Packard:ct10:cvr:
  dmi.product.name: HP EliteBook 8540w
  dmi.sys.vendor: Hewlett-Packard

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