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	 <1257327017.28469.76.camel@johannes.local>
Date: Fri, 6 Nov 2009 14:45:08 -0500
Message-ID: <cb0375e10911061145ja572542hde731eee7279ea1@mail.gmail.com>
Subject: Re: iwlwifi connection troubles, maybe aggregation related
From: Andrew Lutomirski <luto@mit.edu>
To: Johannes Berg <johannes@sipsolutions.net>
Cc: linux-wireless@vger.kernel.org, ilw@linux.intel.com
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Sender: linux-wireless-owner@vger.kernel.org

On Wed, Nov 4, 2009 at 4:30 AM, Johannes Berg <johannes@sipsolutions.net> wrote:
> On Tue, 2009-11-03 at 18:38 -0500, Andrew Lutomirski wrote:
>
>> iwlagn 0000:03:00.0: iwl_tx_agg_start on ra = 00:21:d8:49:4a:52 tid = 0
>
>> Turning on or off power management and fiddling with
>> no_sleep_autoadjust makes no difference. ?Setting tx_agg_tid_enable to
>> zero in debugfs while the connection was working seemed to make it a
>> little more reliable (it lasted long enough to do "git pull" but not
>> much longer).
>>
>> After running "iw dev wlan0 disconnect" a few times, I start to get
>> errors like this:
>>
>> [18078.209635] iwlagn 0000:03:00.0: SENSITIVITY_CMD failed
>> [18078.313461] iwlagn 0000:03:00.0: No space for Tx
>> [18078.313467] iwlagn 0000:03:00.0: Error sending SENSITIVITY_CMD:
>> enqueue_hcmd failed: -28
>> [18078.313470] iwlagn 0000:03:00.0: SENSITIVITY_CMD failed
>> [18078.522409] iwlagn 0000:03:00.0: No space for Tx
>> [18078.522414] iwlagn 0000:03:00.0: Error sending SENSITIVITY_CMD:
>> enqueue_hcmd failed: -28
>
> Sounds like the firmware messes up ...
>
> Maybe as a first workaround you could modprobe iwlagn with
> 11n_disable=1. But I don't know at this point what the problem could be.

11n_disable50=1 seems to work.  I'll reply again if it stops working.

Do the Intel folks have any ideas?

Thanks,
Andy