Are you sure? I can connect, and it's quite stable, the problem happens
after some hours.

What does "dmesg" output (after some minutes of connection)?

I've tried iwl4965 with 2.6.39, but it's very unstable ):, I'm sticking with
2.6.38 for now (even though it's not perfect either)

Pedro Nariyoshi


On Fri, Jun 17, 2011 at 5:58 PM, Pieter <email address hidden> wrote:

> Ubuntu 11.04
> 44:00.0 Network controller: Intel Corporation Centrino Ultimate-N 6300 (rev
> 35)
>
> Re-configuring my AP today, after my wifi 802.11n has been stable lately
> i suddenly experienced problems, with connection loss.
>
> The change that made the difference was on my AP.
>
> 1. Broken:  with only 802.11n on ap allowed.
>
> 2. Fixed: with 802.11bgn on ap allowed.
>
> I connect at N rates 135meg+, but it seems the ap need to support bg for
> the link to be stable to linux.
>
> ** Attachment added: "script to log wifi performance"
>
> https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/630748/+attachment/2173448/+files/pesWifiLogSpeed.sh
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/630748
>
> Title:
>  iwlagn degrades quickly during normal wifi session
>
> Status in The Linux Kernel:
>  Fix Released
> Status in Release Notes for Ubuntu:
>  Fix Released
> Status in “linux-firmware” package in Ubuntu:
>  Won't Fix
> Status in “module-init-tools” package in Ubuntu:
>  Fix Released
> Status in “linux-firmware” source package in Maverick:
>  Won't Fix
> Status in “module-init-tools” source package in Maverick:
>  Fix Released
> Status in “linux-firmware” source package in Natty:
>  Won't Fix
> Status in “module-init-tools” source package in Natty:
>  Fix Released
>
> Bug description:
>  I recently upgraded my lucid laptop (thinkpad X200s) to maverick.  I
>  found after the reboot that my wireless degrades after about 8 hours
>  of ordinary use.  I had 45% packet loss direct to my WAP, and this was
>  easily cleared up by doing "modprobe -r iwlagn; modprobe iwlagn" as
>  root.
>
>  I'd not be so quick to file this except that Paul Collins told me that
>  he'd seen the same behavior from upstream 2.6.35.
>
>  ProblemType: Bug
>  DistroRelease: Ubuntu 10.10
>  Package: linux-image-2.6.35-19-generic 2.6.35-19.28
>  Regression: Yes
>  Reproducible: Yes
>  ProcVersionSignature: Ubuntu 2.6.35-19.28-generic 2.6.35.3
>  Uname: Linux 2.6.35-19-generic x86_64
>  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
>  Architecture: amd64
>  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:  nick       2188 F.... pulseaudio
>  CRDA: Error: [Errno 2] No such file or directory
>  Card0.Amixer.info:
>   Card hw:0 'Intel'/'HDA Intel at 0xf2620000 irq 47'
>     Mixer name : 'Conexant CX20561 (Hermosa)'
>     Components : 'HDA:14f15051,17aa20ff,00100000'
>     Controls      : 14
>     Simple ctrls  : 7
>  Card29.Amixer.info:
>   Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30,
> fw 7XHT22WW-1.04'
>     Mixer name : 'ThinkPad EC 7XHT22WW-1.04'
>     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: Sun Sep  5 11:24:24 2010
>  EcryptfsInUse: Yes
>  HibernationDevice: RESUME=UUID=093be503-d248-45fa-a7fe-77cdd35c0f5a
>  MachineType: LENOVO 7465CTO
>  ProcCmdLine: root=UUID=5237fceb-23d0-412d-84d9-b8f8b3bf28af ro quiet
> splash
>  ProcEnviron:
>   LC_COLLATE=C
>   PATH=(custom, user)
>   LANG=en_US.UTF-8
>   SHELL=/bin/bash
>  RelatedPackageVersions: linux-firmware 1.38
>  SourcePackage: linux
>  WpaSupplicantLog:
>
>  dmi.bios.date: 06/25/2009
>  dmi.bios.vendor: LENOVO
>  dmi.bios.version: 6DET55WW (3.05 )
>  dmi.board.name: 7465CTO
>  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:bvr6DET55WW(3.05):bd06/25/2009:svnLENOVO:pn7465CTO:pvrThinkPadX200s:rvnLENOVO:rn7465CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
>  dmi.product.name: 7465CTO
>  dmi.product.version: ThinkPad X200s
>  dmi.sys.vendor: LENOVO
>
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