Subject: Re: linux 3.2-rcX iwlwifi driver's problem (wifi link unstable
 when moving between multiple APs)
From: "Guy, Wey-Yi" <wey-yi.w.guy@intel.com>
To: Cheng Renquan <crquan@gmail.com>
Cc: "sedat.dilek@gmail.com" <sedat.dilek@gmail.com>,
	Intel Linux Wireless <ilw@linux.intel.com>,
	"linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>
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Content-Type: text/plain; charset="UTF-8"
Date: Tue, 10 Jan 2012 14:27:08 -0800
Message-ID: <1326234428.13074.385.camel@wwguy-huron> (sfid-20120111_003102_459210_E13EE549)
Mime-Version: 1.0
Sender: linux-wireless-owner@vger.kernel.org

Hi Cheng,

On Tue, 2012-01-10 at 15:17 -0800, Cheng Renquan wrote:
> I've upgraded to Linux 3.2 and roaming failed randomly again,
> 
> after the failure it may recover
> sometimes by switch off and on the wifi button on laptop,
> sometimes by "modprobe -r iwlwifi && modprobe iwlwifi",
> sometimes by "stop networkmanager and start networkmanager",
> sometimes recover automatically 10 or 20 minutes later,
> sometimes never recover, infinitely looping (can only move to other
> place, but same place has good wifi coverage verified by other
> colleagues, win/mac users)
> 
> 
> have checked it has your recent 78feb35 & 81670a4 commits,
> $ git log -n5 --no-merges --oneline v3.2 -- drivers/net/wireless/iwlwifi/
> 96f1f05 iwlwifi: update SCD BC table for all SCD queues
> 78feb35 iwlwifi: allow to switch to HT40 if not associated
> 81670a4 iwlwifi: tx_sync only on PAN context
> 123877b iwlwifi: do not set the sequence control bit is not needed
> 9995ffe iwlwifi: change the default behavior of watchdog timer
> 
Are you saying without those two commits (78feb35 & 81670a4), the
roaming works?

Thanks
Wey