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[Launchpad Bug Tracker <1155443@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/1155443

Title:
  10ec:8171 [Compaq Presario CQ62-227TU] RTL8192se kernel driver
  unstable in low power mode

Status in “linux” package in Ubuntu:
  Expired

Bug description:
  Behaviour noticed immediately after kernel upgrade from 3.0.0-31 to
  32.

  When laptop is connected to power, all is as it should be.

  When laptop is disconnected from mains, and running on battery, the
  wireless will continue working for a while (less than a minute),  then
  drop out and Network Manager will attempt to reconnect to the WLAN. It
  will fail (timing out) forever until Network manager gives up.

  No indication or cause of failure is given in any logs, or in dmesg.

  When the module has failed, then running "sudo rmmod rtl8192se rtlwifi
  mac80211 cfg80211 && sudo modprobe rtl8192se" in a terminal will re-
  enable wireless, but it will inevitably drop out again just as it did
  before. Reconnecting mains power will also restore stability. (That
  is, if the wireless has failed, reattaching mains power will not of
  itself restore it, but if the kernel module is rmmod/modprobe-d back
  in, it will remain working correctly, and not drop out again so long
  as it is on mains power.)

  I have since checked under 3.0.0.31 again, and this problem does not
  occur.

  It looks like the rtl8192se module is unstable when the Power
  Management settings are on battery mode in this kernel version.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: linux-image-3.0.0-32-generic-pae 3.0.0-32.50
  ProcVersionSignature: Ubuntu 3.0.0-32.50-generic-pae 3.0.65
  Uname: Linux 3.0.0-32-generic-pae i686
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 1.23-0ubuntu4.1
  Architecture: i386
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: ALC270 Analog [ALC270 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  staples    1867 F.... xfce4-volumed
                        staples    1899 f.... xfce4-mixer-plu
                        staples    1909 F.... pulseaudio
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xd4500000 irq 45'
     Mixer name	: 'Intel Cantiga HDMI'
     Components	: 'HDA:10ec0270,103c1484,00100100 HDA:80862802,80860101,00100000'
     Controls      : 20
     Simple ctrls  : 11
  Date: Fri Mar 15 15:47:41 2013
  HibernationDevice: RESUME=UUID=11661010-43bb-4686-b55f-775986dab970
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
  MachineType: Hewlett-Packard Presario CQ62 Notebook PC
  ProcEnviron:
   PATH=(custom, no user)
   LANG=en_AU.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-32-generic-pae root=UUID=8e115c9a-6781-4a65-b122-f3406384055c ro splash
  RelatedPackageVersions:
   linux-restricted-modules-3.0.0-32-generic-pae N/A
   linux-backports-modules-3.0.0-32-generic-pae  N/A
   linux-firmware                                1.60.1
  SourcePackage: linux
  UpgradeStatus: Upgraded to oneiric on 2012-06-04 (284 days ago)
  dmi.bios.date: 04/26/2010
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: F.15
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: 1484
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: 77.18
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnHewlett-Packard:bvrF.15:bd04/26/2010:svnHewlett-Packard:pnPresarioCQ62NotebookPC:pvr049B110000202810000020000:rvnHewlett-Packard:rn1484:rvr77.18:cvnHewlett-Packard:ct10:cvrN/A:
  dmi.product.name: Presario CQ62 Notebook PC
  dmi.product.version: 049B110000202810000020000
  dmi.sys.vendor: Hewlett-Packard

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