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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This change was made by a bot.

** Changed in: linux (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1249008

Title:
  iwlwifi kernel driver does not obey power saving settings

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Poor ping times (high latency) can be observed after unplugging from a
  power source.

  To recreate this issue start by disabling power saving and hw
  encryption while your laptop is plugged in.

  Power saving can be turned off at module load time, or with iwconfig
  [dev] power off

  rmmod iwldvm iwlwifi && modprobe iwlwifi power_save=0 swcrypto=1
  power_level=1

  Will remove the driver and re-insert with power saving off and sw
  encryption on.

  start a ping to your router

  Watch latency; should be 3ms or so.

  Unplug laptop from power and watch latency rise to 60+ ms

  To get reliable networking again, either plug laptop back in or re-
  issue commands to disable power saving.

  Changing the power state of the machine changes the power state of the
  nic regardless of setting. What I've found is that setting power
  saving to on/off puts the card in power saving state instead of
  disabling or enabling based on power source.

  If you unplug your machine you must re-issue the commands to disable
  power saving.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-extra-3.11.0-12-generic 3.11.0-12.19
  ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
  Uname: Linux 3.11.0-12-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.12.5-0ubuntu2.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  junfan     2247 F.... pulseaudio
   /dev/snd/controlC0:  junfan     2247 F.... pulseaudio
  Date: Thu Nov  7 11:20:09 2013
  InstallationDate: Installed on 2013-10-19 (19 days ago)
  InstallationMedia: Kubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MachineType: LENOVO 20193
  MarkForUpload: True
  ProcFB:

  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.11.0-12-generic root=UUID=dfae3dc5-7847-4e9e-a98c-b4ca8ef075a2 ro quiet splash
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-12-generic N/A
   linux-backports-modules-3.11.0-12-generic  N/A
   linux-firmware                             1.116
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/08/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 6BCN42WW(V2.02)
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: INVALID
  dmi.board.vendor: LENOVO
  dmi.board.version: 31900003WIN8 STD MLT
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo IdeaPad Y500
  dmi.modalias: dmi:bvnLENOVO:bvr6BCN42WW(V2.02):bd02/08/2013:svnLENOVO:pn20193:pvrLenovoIdeaPadY500:rvnLENOVO:rnINVALID:rvr31900003WIN8STDMLT:cvnLENOVO:ct10:cvrLenovoIdeaPadY500:
  dmi.product.name: 20193
  dmi.product.version: Lenovo IdeaPad Y500
  dmi.sys.vendor: LENOVO

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