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------------------------------------------------------------------------
On 2012-02-05T06:18:30+00:00 Simon wrote:

After a period of time, the wireless simply stops functioning... NetworkManager 
thinks its still connected.. but no network traffic works.
After a period of time (if left) sometimes it reconnects at G-54Mbit speed.. vs 
'N' at around 270Mbit

The following are observed in dmesg:

[  505.669220] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:04:ed:bb:c6:fd tid = 0
[  555.202192] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:04:ed:bb:c6:fd tid = 0
[  588.834218] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:04:ed:bb:c6:fd tid = 0
[  617.740773] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:04:ed:bb:c6:fd tid = 0
[  690.116581] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:04:ed:bb:c6:fd tid = 0
[  742.430541] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:04:ed:bb:c6:fd tid = 0
[  788.704026] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:04:ed:bb:c6:fd tid = 0
[  801.676020] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:04:ed:bb:c6:fd tid = 0
[  962.686813] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:04:ed:bb:c6:fd tid = 0
[ 1015.634260] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:04:ed:bb:c6:fd tid = 0
[ 1099.420837] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:04:ed:bb:c6:fd tid = 0
[ 1107.568703] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:04:ed:bb:c6:fd tid = 0
[ 1119.465765] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:04:ed:bb:c6:fd tid = 0
[ 1147.984058] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:04:ed:bb:c6:fd tid = 0
[ 1213.937449] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:04:ed:bb:c6:fd tid = 0
[ 1239.211977] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:04:ed:bb:c6:fd tid = 0
[ 1352.128153] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:04:ed:bb:c6:fd tid = 0
[ 1428.874172] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:04:ed:bb:c6:fd tid = 0
[ 1467.239910] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:04:ed:bb:c6:fd tid = 0
[ 1501.816674] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:04:ed:bb:c6:fd tid = 0
[ 1585.802417] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:04:ed:bb:c6:fd tid = 0
[ 1638.777505] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:04:ed:bb:c6:fd tid = 0
[ 1669.836635] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:04:ed:bb:c6:fd tid = 0
[ 1706.886181] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:04:ed:bb:c6:fd tid = 0
[ 1733.298790] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:04:ed:bb:c6:fd tid = 0



Kernel; Linux greenback.local 3.2.2-1.fc16.x86_64 #1 SMP Thu Jan 26
03:21:58 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux




Some details as to the wireless adapter;

[    5.214347] Intel(R) Wireless WiFi Link AGN driver for Linux, in-tree:
[    5.214441] iwlwifi 0000:03:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
[    5.214496] iwlwifi 0000:03:00.0: setting latency timer to 64
[    5.214542] iwlwifi 0000:03:00.0: pci_resource_len = 0x00002000
[    5.214544] iwlwifi 0000:03:00.0: pci_resource_base = ffffc900058a0000
[    5.214545] iwlwifi 0000:03:00.0: HW Revision ID = 0x34
[    5.214830] iwlwifi 0000:03:00.0: irq 50 for MSI/MSI-X
[    5.214919] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_DEBUG disabled
[    5.214921] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_DEBUGFS disabled
[    5.214922] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_DEVICE_TRACING disabled
[    5.214924] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_DEVICE_TESTMODE disabled
[    5.214925] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_P2P disabled
[    5.214956] iwlwifi 0000:03:00.0: Detected Intel(R) Centrino(R) Advanced-N 
6205 AGN, REV=0xB0
[    5.215034] iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
[    5.225137] iwlwifi 0000:03:00.0: device EEPROM VER=0x715, CALIB=0x6
[    5.225140] iwlwifi 0000:03:00.0: Device SKU: 0x1F0
[    5.225142] iwlwifi 0000:03:00.0: Valid Tx ant: 0x3, Valid Rx ant: 0x3
[    5.225166] iwlwifi 0000:03:00.0: Tunable channels: 13 802.11bg, 24 802.11a 
channels
[    5.241189] iwlwifi 0000:03:00.0: loaded firmware version 17.168.5.3 build 
42301
[    9.282736] iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
[    9.282928] iwlwifi 0000:03:00.0: Radio type=0x1-0x2-0x0
[    9.565154] iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
[    9.565344] iwlwifi 0000:03:00.0: Radio type=0x1-0x2-0x0
[   45.937516] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:04:ed:bb:c6:fd tid = 6

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/974838/comments/0

------------------------------------------------------------------------
On 2012-02-05T17:32:10+00:00 Jim wrote:

I have this problem too. I'm using Fedora 16 with all the latest updates. It 
seems to have stopped working properly in the last few days.
To get my connection backup I have to
systemctl restart NetworkManager.service 

/var/log/messages is full of lines like
Feb  5 07:45:17 localhost kernel: [ 7143.937635] iwlwifi 0000:06:00.0: Tx 
aggregation enabled on ra = 00:26:5a:cc:6a:5d tid = 0

It is an incredibly annoying problem

kernel-3.2.2-1.fc16.x86_64

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/974838/comments/1

------------------------------------------------------------------------
On 2012-02-05T23:24:04+00:00 Jim wrote:

I think this is a duplicate of 785561

making a file
 /etc/modprobe.d/iwlwifi.conf with a single line
 like this:
options iwlwifi 11n_disable=1
is a temporary fix

this line disables 11n and leaves things in g

There is also a thread from November 2011 on the kernel mailing list so
why did this end up released when it's disastrous for anyone with this
wifi card ?

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/974838/comments/2

------------------------------------------------------------------------
On 2012-02-05T23:29:32+00:00 Jim wrote:

see this discussion
http://lkml.indiana.edu/hypermail/linux/kernel/1111.3/00007.html

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/974838/comments/3

------------------------------------------------------------------------
On 2012-02-06T01:59:38+00:00 Mike wrote:

confirm this bug on kernel-3.2.2-1.fc16.x86_64.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/974838/comments/4

------------------------------------------------------------------------
On 2012-02-06T02:06:58+00:00 Jim wrote:

yes the problem is with kernel-3.2.2-1.fc16.x86_64

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/974838/comments/5

------------------------------------------------------------------------
On 2012-02-06T09:47:39+00:00 Simon wrote:

An update released just then into 'updates' reports to fix this, update
includes kernel-3.2.3-2.fc16.x86_64

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/974838/comments/6

------------------------------------------------------------------------
On 2012-02-06T09:49:47+00:00 Simon wrote:

Currently connected back at 243 Mb/s ... this bug is VERY reminiscent of
something around this time last year that had the same work around
'options iwlwifi 11n_disable=1'

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/974838/comments/7

------------------------------------------------------------------------
On 2012-02-06T15:11:44+00:00 John wrote:

kernel-3.2.3-2.fc16 should address this issue.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/974838/comments/8

------------------------------------------------------------------------
On 2012-02-06T16:29:47+00:00 Jim wrote:

kernel-3.2.3-2.fc16.x86_64
appears to fix the problem
thank you

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/974838/comments/9


** Changed in: linux (Fedora)
       Status: Unknown => Fix Released

** Changed in: linux (Fedora)
   Importance: Unknown => High

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/974838

Title:
  Wireless Dropout - Tx aggregation enabled on ra (workaround: iwlwifi
  requires 11n_disable=1)

Status in linux package in Ubuntu:
  Incomplete
Status in linux package in Fedora:
  Fix Released

Bug description:
  After repeated messages in syslog with "Wireless Dropout - Tx
  aggregation enabled on ra" the wireless connection drops but nm-applet
  shows the connection is maintained.

  
  [ 1993.150229] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:24:a5:d7:9e:5e tid = 0
  [ 2027.374298] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:24:a5:d7:9e:5e tid = 0
  [ 2038.349962] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:24:a5:d7:9e:5e tid = 0
  [ 2067.814290] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:24:a5:d7:9e:5e tid = 0
  [ 2165.598224] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:24:a5:d7:9e:5e tid = 0
  [ 2213.412664] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:24:a5:d7:9e:5e tid = 0
  [ 2236.470968] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:24:a5:d7:9e:5e tid = 6
  [ 2270.489254] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:24:a5:d7:9e:5e tid = 0
  [ 2714.040308] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:24:a5:d7:9e:5e tid = 0
  [ 2753.314277] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:24:a5:d7:9e:5e tid = 0
  [ 2788.096691] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:24:a5:d7:9e:5e tid = 0
  [ 2934.442107] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:24:a5:d7:9e:5e tid = 0
  [ 2993.274320] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 
00:24:a5:d7:9e:5e tid = 0

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