[Bug 548992] Re: Wireless connection frequently drops [deauthenticating by local choice (reason=3)]

Thu Nov 4 11:39:04 UTC 2010

I was able to reproduce this bug also with a livecd (both x64 and i386) on a
dell xps studio 1340 (atheros AR928X wireless chip) both with or without
ipv6.
Furthermore everytime I measured the time between one disassociaton and the
next one, I got, for every boot, a multiple of a certain quantity; I explain
it better:

boot number 1: looking at dmesg with "dmesg | grep reason" i have time
difference in the messages that
                       are always multiple of 120 (e.g. first deauth -
120sec - 2nd deatuh - 360sec - 3rd deauth -
                       120sec - 4th and so on)

boot number 2: same thing but with multiples of 16...

boot number 3: same thing but with multiples of some other number...

I really think there are few chanches to get this by chance ( for every boot
I monitored something like 20-30 deauth, and they were always following the
path). To me this really seems related to some timeout processes.
I wolud like to stress that this never happened with 9.04, 9.10 as far as I
remember, and that (but I this is more a feeling than a fact) the problem is
more likely to happen in areas with many wifi connections.

Strange thing to add, a friend of mine whit exactly the same hardware has
never had the problem and we never found the "deauthenticating by local
choice (reason=3)" message in his dmesg.

On Thu, Nov 4, 2010 at 11:37 AM, iceblueirish
<548992 at bugs.launchpad.net>wrote:

> I hear this could occur if you are running torrents... even after
> stopping all torrents wifi willl not reconnect until reboot.
>
> wicd does NOT WORK! either don't run torrents or only one at a time I
> hear it's actually if you're running too many (sometimes only 2!)...
>
> --
> Wireless connection frequently drops  [deauthenticating by local choice
> (reason=3)]
> https://bugs.launchpad.net/bugs/548992
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in “linux” package in Ubuntu: Triaged
> Status in Debian GNU/Linux: Confirmed
> Status in Fedora: Unknown
>
> Bug description:
> Since about 8.04 or 8.10, perhaps when Ubuntu switched over to
> NetworkManager, my wireless connection has randomly dropped its association
> with the access point, about every ten minutes. For a while, the connection
> will just die, then it will be detected and NetworkManager will
> re-authenticate and re-associate.
>
> In Lucid Lynx, this problem is now much more frequent (often exactly every
> two or four minutes) and now Ubuntu does not report that the connection has
> dropped. Instead, it re-associates in the background, eventually connecting
> to the access point again, all behind the scenes. Thus, the only thing that
> has changed, aside from the greater frequency, is that Ubuntu now doesn't
> report that it has dropped the connection, which seems deceptive from
> previous versions.
>
> This may be the same bug as #429035, but my dmesg output is a bit
> different.  This problem occurs primarily on a WPA2 Enterprise network, but
> the problem has occurred on other network security configurations as well.
>
> dmesg output after many instances of disconnects:
>
> [ 5423.541343] wlan0: deauthenticating from 00:26:cb:17:bd:41 by local
> choice (reason=3)
> [ 5425.134984] wlan0: deauthenticating from 00:26:cb:17:bd:41 by local
> choice (reason=3)
> [ 5425.174916] wlan0: direct probe to AP 00:26:cb:17:bd:41 (try 1)
> [ 5425.177083] wlan0: direct probe responded
> [ 5425.177087] wlan0: authenticate with AP 00:26:cb:17:bd:41 (try 1)
> [ 5425.179379] wlan0: authenticated
> [ 5425.179399] wlan0: associate with AP 00:26:cb:17:bd:41 (try 1)
> [ 5425.182881] wlan0: RX AssocResp from 00:26:cb:17:bd:41 (capab=0x431
> status=0 aid=68)
> [ 5425.182884] wlan0: associated
> [ 5437.562165] iwlagn 0000:0b:00.0: iwl_tx_agg_start on ra =
> 00:26:cb:17:bd:41 tid = 0
> [ 5480.893417] wlan0: deauthenticating from 00:26:cb:17:bd:41 by local
> choice (reason=3)
> [ 5482.475859] wlan0: deauthenticating from 00:26:cb:17:bd:41 by local
> choice (reason=3)
> [ 5482.515034] wlan0: direct probe to AP 00:26:cb:17:bd:41 (try 1)
> [ 5482.517187] wlan0: direct probe responded
> [ 5482.517190] wlan0: authenticate with AP 00:26:cb:17:bd:41 (try 1)
> [ 5482.518636] wlan0: authenticated
> [ 5482.518651] wlan0: associate with AP 00:26:cb:17:bd:41 (try 1)
> [ 5482.522378] wlan0: RX AssocResp from 00:26:cb:17:bd:41 (capab=0x431
> status=0 aid=68)
> [ 5482.522381] wlan0: associated
> [ 5508.093339] wlan0: deauthenticating from 00:26:cb:17:bd:41 by local
> choice (reason=3)
> [ 5508.107358] wlan0: direct probe to AP 00:26:cb:17:bd:41 (try 1)
> [ 5508.107412] wlan0: deauthenticating from 00:26:cb:17:bd:41 by local
> choice (reason=3)
> [ 5508.110595] wlan0: direct probe to AP 00:26:cb:16:e8:d1 (try 1)
> [ 5508.113114] wlan0: direct probe responded
> [ 5508.113123] wlan0: authenticate with AP 00:26:cb:16:e8:d1 (try 1)
> [ 5508.115392] wlan0: authenticated
> [ 5508.121973] wlan0: associate with AP 00:26:cb:16:e8:d1 (try 1)
> [ 5508.127254] wlan0: RX AssocResp from 00:26:cb:16:e8:d1 (capab=0x431
> status=0 aid=16)
> [ 5508.127262] wlan0: associated
> [ 5525.110100] iwlagn 0000:0b:00.0: iwl_tx_agg_start on ra =
> 00:26:cb:16:e8:d1 tid = 0
> [ 5546.029401] wlan0: deauthenticating from 00:26:cb:16:e8:d1 by local
> choice (reason=3)
> [ 5546.042276] wlan0: direct probe to AP 00:26:cb:16:e8:d1 (try 1)
> [ 5546.042311] wlan0: deauthenticating from 00:26:cb:16:e8:d1 by local
> choice (reason=3)
> [ 5546.045656] wlan0: direct probe to AP 00:26:cb:17:bd:41 (try 1)
> [ 5546.048069] wlan0: direct probe responded
> [ 5546.048077] wlan0: authenticate with AP 00:26:cb:17:bd:41 (try 1)
> [ 5546.049864] wlan0: authenticated
> [ 5546.077267] wlan0: associate with AP 00:26:cb:17:bd:41 (try 1)
> [ 5546.080885] wlan0: RX AssocResp from 00:26:cb:17:bd:41 (capab=0x431
> status=0 aid=79)
> [ 5546.080888] wlan0: associated
> [ 5562.875489] iwlagn 0000:0b:00.0: iwl_tx_agg_start on ra =
> 00:26:cb:17:bd:41 tid = 0
> [ 5571.881150] wlan0: deauthenticating from 00:26:cb:17:bd:41 by local
> choice (reason=3)
> [ 5571.928466] wlan0: deauthenticating from 00:26:cb:17:bd:41 by local
> choice (reason=3)
> [ 5571.967725] wlan0: direct probe to AP 00:26:cb:17:bd:41 (try 1)
> [ 5571.969866] wlan0: direct probe responded
> [ 5571.969870] wlan0: authenticate with AP 00:26:cb:17:bd:41 (try 1)
> [ 5571.971428] wlan0: authenticated
> [ 5571.971446] wlan0: associate with AP 00:26:cb:17:bd:41 (try 1)
> [ 5571.974650] wlan0: RX AssocResp from 00:26:cb:17:bd:41 (capab=0x431
> status=0 aid=79)
> [ 5571.974658] wlan0: associated
> [ 5579.266995] iwlagn 0000:0b:00.0: iwl_tx_agg_start on ra =
> 00:26:cb:17:bd:41 tid = 0
> [ 5674.773488] wlan0: deauthenticating from 00:26:cb:17:bd:41 by local
> choice (reason=3)
> [ 5674.815768] wlan0: deauthenticating from 00:26:cb:17:bd:41 by local
> choice (reason=3)
> [ 5674.855855] wlan0: direct probe to AP 00:26:cb:17:bd:41 (try 1)
> [ 5674.858186] wlan0: direct probe responded
> [ 5674.858195] wlan0: authenticate with AP 00:26:cb:17:bd:41 (try 1)
> [ 5674.859768] wlan0: authenticated
> [ 5674.859811] wlan0: associate with AP 00:26:cb:17:bd:41 (try 1)
> [ 5674.863242] wlan0: RX AssocResp from 00:26:cb:17:bd:41 (capab=0x431
> status=0 aid=79)
> [ 5674.863249] wlan0: associated
> [ 5693.936473] iwlagn 0000:0b:00.0: iwl_tx_agg_start on ra =
> 00:26:cb:17:bd:41 tid = 0
> [ 5871.177501] wlan0: deauthenticating from 00:26:cb:17:bd:41 by local
> choice (reason=3)
> [ 5872.845146] wlan0: deauthenticating from 00:26:cb:17:bd:41 by local
> choice (reason=3)
> [ 5872.884514] wlan0: direct probe to AP 00:26:cb:17:bd:41 (try 1)
> [ 5872.886671] wlan0: direct probe responded
> [ 5872.886679] wlan0: authenticate with AP 00:26:cb:17:bd:41 (try 1)
> [ 5872.888855] wlan0: authenticated
> [ 5872.888902] wlan0: associate with AP 00:26:cb:17:bd:41 (try 1)
> [ 5872.892134] wlan0: RX AssocResp from 00:26:cb:17:bd:41 (capab=0x431
> status=0 aid=79)
> [ 5872.892142] wlan0: associated
> [ 6091.564428] iwlagn 0000:0b:00.0: iwl_tx_agg_start on ra =
> 00:26:cb:17:bd:41 tid = 0
> [ 6122.697260] wlan0: deauthenticating from 00:26:cb:17:bd:41 by local
> choice (reason=3)
> [ 6124.304877] wlan0: deauthenticating from 00:26:cb:17:bd:41 by local
> choice (reason=3)
> [ 6124.344923] wlan0: direct probe to AP 00:26:cb:17:bd:41 (try 1)
> [ 6124.347041] wlan0: direct probe responded
> [ 6124.347043] wlan0: authenticate with AP 00:26:cb:17:bd:41 (try 1)
> [ 6124.348599] wlan0: authenticated
> [ 6124.348624] wlan0: associate with AP 00:26:cb:17:bd:41 (try 1)
> [ 6124.352604] wlan0: RX AssocResp from 00:26:cb:17:bd:41 (capab=0x431
> status=0 aid=79)
> [ 6124.352609] wlan0: associated
> [ 6129.588373] iwlagn 0000:0b:00.0: iwl_tx_agg_start on ra =
> 00:26:cb:17:bd:41 tid = 0
> [ 6246.053521] wlan0: deauthenticating from 00:26:cb:17:bd:41 by local
> choice (reason=3)
> [ 6246.089232] wlan0: deauthenticating from 00:26:cb:17:bd:41 by local
> choice (reason=3)
> [ 6246.129301] wlan0: direct probe to AP 00:26:cb:17:bd:41 (try 1)
> [ 6246.131530] wlan0: direct probe responded
> [ 6246.131540] wlan0: authenticate with AP 00:26:cb:17:bd:41 (try 1)
> [ 6246.133188] wlan0: authenticated
> [ 6246.133229] wlan0: associate with AP 00:26:cb:17:bd:41 (try 1)
> [ 6246.136579] wlan0: RX AssocResp from 00:26:cb:17:bd:41 (capab=0x431
> status=0 aid=79)
> [ 6246.136586] wlan0: associated
>
>
>
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-- 
Wireless connection frequently drops  [deauthenticating by local choice (reason=3)]
https://bugs.launchpad.net/bugs/548992
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