8086:4238 [Lenovo ThinkPad X201] iwlwifi drops connection when using 802.11n
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Invalid
|
Undecided
|
Unassigned |
Bug Description
Symptoms: After a few minutes, the WiFi connection to my home router first becomes slow (packet loss), then entirely unusable. NetWork manager still shows the connection as up and working.
dmesg shows messages like these:
Aug 9 06:17:16 thinkpad kernel: [ 5026.531127] iwlwifi 0000:02:00.0: Tx aggrega
tion enabled on ra = b0:48:7a:d6:91:50 tid = 6
WORKAROUND: rfkill to disable and enable WiFi, or add:
options iwlwifi 11n_disable=1
to /etc/modprobe.
However, this means that all my network connections will only run in 802.11a/g mode, which is undesirably slow. Other people using MacOS in my place don't observe any issues, so I can rule out the router(s) as the culprits.
Hardware: 02:00.0 Network controller: Intel Corporation Centrino Ultimate-N 6300 (rev 35)
Routers: TP-Link WR1043ND, WR2543ND using OpenWRT trunk.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-
ProcVersionSign
Uname: Linux 3.2.0-27-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu12
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/
/dev/snd/
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xf2520000 irq 44'
Mixer name : 'Intel IbexPeak HDMI'
Components : 'HDA:14f15069,
Controls : 14
Simple ctrls : 6
Card29.Amixer.info:
Card hw:29 'ThinkPadEC'
Mixer name : 'ThinkPad EC 6QHT33WW-1.14'
Components : ''
Controls : 1
Simple ctrls : 1
Card29.
Simple mixer control 'Console',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [on]
Date: Thu Aug 9 12:24:19 2012
HibernationDevice: RESUME=
InstallationMedia: Xubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
MachineType: LENOVO 3626A14
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=
RelatedPackageV
linux-
linux-
linux-firmware 1.79
SourcePackage: linux
StagingDrivers: mei
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/26/2012
dmi.bios.vendor: LENOVO
dmi.bios.version: 6QET69WW (1.39 )
dmi.board.name: 3626A14
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.
dmi.modalias: dmi:bvnLENOVO:
dmi.product.name: 3626A14
dmi.product.
dmi.sys.vendor: LENOVO
Changed in linux (Ubuntu): | |
status: | New → Confirmed |
Changed in linux: | |
importance: | Unknown → High |
status: | Unknown → Confirmed |
Changed in linux (Ubuntu): | |
status: | Incomplete → Confirmed |
tags: | added: raring |
description: | updated |
summary: |
- iwlwifi drops connection when using 802.11n + 8086:4238] iwlwifi drops connection when using 802.11n |
summary: |
- 8086:4238] iwlwifi drops connection when using 802.11n + 8086:4238 iwlwifi drops connection when using 802.11n |
Changed in fedora: | |
importance: | Unknown → Medium |
status: | Unknown → Fix Released |
no longer affects: | linux (Ubuntu) |
affects: | fedora → linux (Ubuntu) |
Changed in linux (Ubuntu): | |
importance: | Medium → Undecided |
status: | Fix Released → New |
no longer affects: | linux (Ubuntu) |
Changed in linux (Ubuntu): | |
status: | New → Confirmed |
affects: | linux (Debian) → linux (Ubuntu) |
Changed in linux (Ubuntu): | |
status: | New → Invalid |
Would it be possible for you to test the latest upstream kernel? Refer to https:/ /wiki.ubuntu. com/KernelMainl ineBuilds . Please test the latest v3.5kernel[0] (Not a kernel in the daily directory) and install both the linux-image and linux-image-extra .deb packages.
Once you've tested the upstream kernel, please remove the 'needs- upstream- testing' tag. Please only remove that one tag and leave the other tags. 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.
If this bug is fixed in the mainline kernel, please add the following tag 'kernel- fixed-upstream' .
If the mainline kernel does not fix this bug, please add the tag: 'kernel- bug-exists- upstream' .
If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel- unable- to-test- upstream' .
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".
Thanks in advance.
[0] http:// kernel. ubuntu. com/~kernel- ppa/mainline/ v3.6-rc1- quantal/