Ubuntu
linux package

wlan is unstable since lucid

Bug #575213 reported by Spjoe on 2010-05-04

This bug affects 8 people

Affects		Status	Importance	Assigned to	Milestone
	Linux	Invalid	Undecided	Unassigned
	linux (Ubuntu)	Invalid	Undecided	Unassigned

Bug Description

Since i use ubuntu 10.04 my wlan is extreme unstable. If i open too much connection ma wlan connection breaks. Tested it ith 3 different wlan-routers. And one other OS. So i'm sure it is a problem with ubuntu

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-21-generic-pae 2.6.32-21.32
Regression: Yes
Reproducible: No
ProcVersionSignature: Ubuntu 2.6.32-21.32-generic-pae 2.6.32.11+drm33.2
Uname: Linux 2.6.32-21-generic-pae i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: i386
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: camillo 1458 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xfc020000 irq 17'
   Mixer name : 'Conexant CX20561 (Hermosa)'
   Components : 'HDA:14f15051,17aa2100,00100000 HDA:14f12c06,17aa2122,00100000'
   Controls : 14
   Simple ctrls : 7
Card29.Amixer.info:
Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 7VHT12WW-1.01'
   Mixer name : 'ThinkPad EC 7VHT12WW-1.01'
   Components : ''
   Controls : 1
   Simple ctrls : 1
Card29.Amixer.values:
Simple mixer control 'Console',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
Date: Tue May 4 16:41:32 2010
Frequency: Once a day.
HibernationDevice: RESUME=UUID=8d58ff0f-0591-4203-b716-b63b284e8ea6
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Release Candidate i386 (20100419.1)
MachineType: LENOVO 4061Y14
PccardctlIdent:
Socket 0:
   no product info available
PccardctlStatus:
Socket 0:
   no card
ProcCmdLine: BOOT_IMAGE=/vmlinuz-2.6.32-21-generic-pae root=UUID=ea47379f-b555-496b-b59a-5a9fd04c40cd ro quiet splash
ProcEnviron:
LANG=de_AT.utf8
SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.34
SourcePackage: linux
dmi.bios.date: 09/08/2008
dmi.bios.vendor: LENOVO
dmi.bios.version: 6FET45WW (1.15 )
dmi.board.name: 4061Y14
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr6FET45WW(1.15):bd09/08/2008:svnLENOVO:pn4061Y14:pvrThinkPadW500:rvnLENOVO:rn4061Y14:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 4061Y14
dmi.product.version: ThinkPad W500
dmi.sys.vendor: LENOVO

Tags:

Revision history for this message

Spjoe (cdellmour) wrote on 2010-05-04:

AlsaDevices.txt Edit (587 bytes, text/plain; charset="utf-8")
AplayDevices.txt Edit (281 bytes, text/plain; charset="utf-8")
BootDmesg.txt Edit (58.8 KiB, text/plain; charset="utf-8")
Card0.Amixer.values.txt Edit (1.5 KiB, text/plain; charset="utf-8")
Card0.Codecs.codec.0.txt Edit (5.0 KiB, text/plain; charset="utf-8")
Card0.Codecs.codec.1.txt Edit (146 bytes, text/plain; charset="utf-8")
CurrentDmesg.txt Edit (49.2 KiB, text/plain; charset="utf-8")
Dependencies.txt Edit (1.3 KiB, text/plain; charset="utf-8")
IwConfig.txt Edit (560 bytes, text/plain; charset="utf-8")
Lspci.txt Edit (18.1 KiB, text/plain; charset="utf-8")
Lsusb.txt Edit (643 bytes, text/plain; charset="utf-8")
PciMultimedia.txt Edit (588 bytes, text/plain; charset="utf-8")
ProcCpuinfo.txt Edit (1.6 KiB, text/plain; charset="utf-8")
ProcInterrupts.txt Edit (1.9 KiB, text/plain; charset="utf-8")
ProcModules.txt Edit (3.4 KiB, text/plain; charset="utf-8")
RfKill.txt Edit (182 bytes, text/plain; charset="utf-8")
UdevDb.txt Edit (133.5 KiB, text/plain; charset="utf-8")
UdevLog.txt Edit (278.9 KiB, text/plain; charset="utf-8")
WifiSyslog.txt Edit (192.5 KiB, text/plain; charset="utf-8")

Revision history for this message

Jeremy Foshee (jeremyfoshee) wrote on 2010-05-04:

Hi Spjoe,

If you could also please test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text. Please let us know your results.

Thanks in advance.

[This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]

tags:	added: kj-triage
Changed in linux (Ubuntu):
status:	New → Incomplete

Revision history for this message

Spjoe (cdellmour) wrote on 2010-05-04:

I have done the upstream test as requested.
Problem is the same.

tags:

removed: needs-upstream-testing

Revision history for this message

Spjoe (cdellmour) wrote on 2010-05-08:

Now it work better, I do not know what is changed but now wlan is stable again

thx

planix (ohneplan) on 2010-06-28

Changed in linux (Ubuntu):
status:	Incomplete → Confirmed

Revision history for this message

daniel_L (daniel-das-grauen) wrote on 2010-06-30:

I did the upstream testing with kernel 2.6.35-999-generic but there was no noticable difference to the bahaviour than with kernel 2.6.32-22-generic. What *seems* to help is setting the MTU of the wlan-device to 1492 instead of Ubuntu's default 1500 (sudo ifconfig wlan0 mtu 1492). With this setting I'm not getting wlan disconnects all the time but they aren't gone either. This needs some more testing though. Hopefully someone can confirm this.

Revision history for this message

georf (georf) wrote on 2010-08-05:

I changed the MTU to 1492 and try again, but I get a disconnecting.

I can reproduse the problem with a youtube video on high quality.

Revision history for this message

JohanV (info-studiocascade) wrote on 2010-09-14:

I confirm that I have the same problem.
It happens most of time when I use a lot of bandwidth.
(video, simultaneous downloads etc)

My router is a TP-link TL-WR1043ND with WPA2 security with newest firmware.
My laptop is a Packard Bell EasyNote TJ66 also with newest firmware.

Other computers in my network (wired) don't have this problem.

It seems that the problem must be found in Ubuntu.
My laptop is dualboot and on the Mickeysoft-partition it has no problem with wireless.

Another strange thing is, that on the router of my neighbours (also TP-link but without encryption) I don't have problems.

Revision history for this message

Carsten Rietbrock (crietbrock) wrote on 2010-09-28:

I have a similar problem on a Toshiba Satellite MX-30 and Lucid. I am using a FritzBox 7270 and the log on the box shows, that the WLAN-connection is lost and reconnected up to 4 times a minute.
Windows does not have any problems.

Revision history for this message

praseodym (oliver-ehlert) wrote on 2010-09-30:

Hey folks,

you may ask your ISP about the right mtu-value and type that particular number into the network-manager-settings, NOT "automatically". If this doesnt work you may try "Wicd" as an alternative networking tool. Dont forget to totally uninstall the GNOME-NM (taking it out of "autostart" can be but is most of the time not enough):

sudo apt-get install --reinstall wicd
sudo apt-get remove --purge network-manager network-manager-gnome

(for KNetworkmanager the other packages, respectively).

The Gnome-NM scans very rude and sharp your available networks, this may cause the disconnections.

Revision history for this message

daniel_L (daniel-das-grauen) wrote on 2010-09-30:

#10

outout of dmesg Edit (3.9 KiB, text/plain)

I recently noticed that the connection not only drops when watching online video streams (= the connection is under load) but also when I'm watching a local (!) video file an there is a download in the background not related to the video at all. Tested with SMPlayer and VLC when watching a simple XviD-file. Seems to be an possible interference of the wlan driver with the radeon-driver or the x-server.

Revision history for this message

daniel_L (daniel-das-grauen) wrote on 2010-09-30:

#11

/var/log/messages Edit (2.3 KiB, text/plain)

Revision history for this message

daniel_L (daniel-das-grauen) wrote on 2010-09-30:

#12

/var/log/daemon.log Edit (5.7 KiB, text/plain)

Revision history for this message

daniel_L (daniel-das-grauen) wrote on 2010-10-01:

#13

Today I installed the mainline kernel 2.6.35.5 which seems to fix the problem. There have been no connection drops at all (the kernel is running since 1 hour with the connection under constant high load). The mainline kernels before that version did not help (I did not test all of them though).

Revision history for this message

Bernhard Hennlich (bernhard-hennlich) wrote on 2010-11-04:

#14

I have the equal problems with equal problems since several ubuntu releases with my netbook acer aspire one and a broadcom wlan. the win xp partition on the same computer and also an other ubuntu laptop in the network connect and behave flawless.
at the moment i use maverick with kernel 2.6.35-22-generic, and the problems persist. update with severl doznes of mb are only possible with a wired connection.

Revision history for this message

penalvch (penalvch) wrote on 2012-04-08:

#15

Spjoe, this bug report is being closed due to your last comment regarding this being fixed with an update. For future reference you can manage the status of your own bugs by clicking on the current status in the yellow line and then choosing a new status in the revealed drop down box. You can learn more about bug statuses at https://wiki.ubuntu.com/Bugs/Status. Thank you again for taking the time to report this bug and helping to make Ubuntu better. Please submit any future bugs you may find.

Changed in linux (Ubuntu):
status:	Confirmed → Invalid
Changed in linux:
status:	New → Invalid

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wlan is unstable since lucid

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