Message-ID: <CAOJsxLFXBQXDtjGkuHV8fpxSy4U0dOdzBm6=4xfy2dMQo7NvOg@mail.gmail.com>
Date:	Wed, 19 Oct 2011 09:11:32 +0300
From:	Pekka Enberg <penberg@...helsinki.fi>
To:	David Rientjes <rientjes@...gle.com>
Cc:	Norbert Preining <preining@...ic.at>, linux-kernel@...r.kernel.org,
	ipw3945-devel@...ts.sourceforge.net,
	Wey-Yi Guy <wey-yi.w.guy@...el.com>, ilw@...ux.intel.com,
	linux-wireless@...r.kernel.org
Subject: Re: iwlagn is getting very shaky

On Wed, Oct 19, 2011 at 9:09 AM, David Rientjes <rientjes@...gle.com> wrote:
> On Wed, 19 Oct 2011, Norbert Preining wrote:
>
>> Hi everyone
>>
>> (please Cc),
>>
>> I am currently running 3.1.0-rc10, and I am having a hard time with
>> the wlan network here at the university.
>>
>> For quite some time, like 10min, it is fine, then suddently the
>> iwlagn driver gives up on me and connection is dropped.
>>
>> In the log file I see:
>> [  172.137011] iwlagn 0000:06:00.0: Tx aggregation enabled on ra = 00:24:c4:ab:bd:ef tid = 0
>> [  821.841016] iwlagn 0000:06:00.0: Tx aggregation enabled on ra = 00:24:c4:ab:bd:ef tid = 6
>> [ 1095.580735] wlan0: direct probe to 00:24:c4:ab:bd:e0 (try 1/3)
>> [ 1095.780076] wlan0: direct probe to 00:24:c4:ab:bd:e0 (try 2/3)
>> [ 1095.980101] wlan0: direct probe to 00:24:c4:ab:bd:e0 (try 3/3)
>> [ 1096.180117] wlan0: direct probe to 00:24:c4:ab:bd:e0 timed out
>> [ 1105.255464] wlan0: deauthenticating from 00:24:c4:ab:bd:ef by local choice (reason=2)
>> [ 1105.255519] iwlagn 0000:06:00.0: Stopping AGG while state not ON or starting
>> [ 1105.265581] cfg80211: Calling CRDA for country: JP
>> [ 1105.271476] wlan0: authenticate with 00:24:c4:ab:bd:e0 (try 1)
>> [ 1105.468105] wlan0: authenticate with 00:24:c4:ab:bd:e0 (try 2)
>> [ 1105.668110] wlan0: authenticate with 00:24:c4:ab:bd:e0 (try 3)
>> [ 1105.868090] wlan0: authentication with 00:24:c4:ab:bd:e0 timed out
>> [ 1113.667890] wlan0: direct probe to 00:24:c4:ab:bd:e0 (try 1/3)
>> [ 1113.864116] wlan0: direct probe to 00:24:c4:ab:bd:e0 (try 2/3)
>> [ 1114.064095] wlan0: direct probe to 00:24:c4:ab:bd:e0 (try 3/3)
>> [ 1114.264109] wlan0: direct probe to 00:24:c4:ab:bd:e0 timed out
>>
>> Somewhere around 1100 the connection is gone and never comes back again.
>>
>> I tried removing the driver module from the kernel and reinserting it,
>> tried to turn on and off the hardware swithc (rfkill), all without
>> no success, the wlan connection remains dead until I reboot.
>>
>> I am not sure exactely when it started, I guess somewhere in the
>> 3.1 cycle, before I was permanently working wiht wlan, now I always
>> plug in the cable.
>>
>> If there is any way to track down this, or any suggestions how I can
>> debug it, please let me know.
>>
>> Hardware: Sony VGN-Z11, Intel(R) WiFi Link 5100 AGN, REV=0x54
>> L1 Enabled; Disabling L0S
>> device EEPROM VER=0x11e, CALIB=0x4
>> Device SKU: 0Xf0
>> Tunable channels: 13 802.11bg, 24 802.11a channels
>> loaded firmware version 8.83.5.1 build 33692 (EXP)
>>
>>
>> On the other hand, the same laptop with the very same configuration
>> works very nicely in my flat's wlan, which is some dirt cheap Japanese
>> only wlan router.
>>
>
> There have been recent issues in 3.1-rc9 reported with iwlagn, see the
> thread at https://lkml.org/lkml/2011/10/15/107 even though you have
> different hardware.  Adding Wey-Yi Guy from Intel and the linux-wireless
> mailing list to the cc.

I'm seeing very similar problems with 3.1-rc9 when my laptop is
connected to an iPhone WiFi hotspot. Works just fine at home where I
use Airport Express.

                        Pekka
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