Public bug reported:
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
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386 oneiric
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https://bugs.launchpad.net/bugs/1155443
Title:
RTL8192se kernel driver unstable in low power mode
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