iwlwifi: Bug - can't connect to WPA PSK access point any more

[Barteq <barteqpl@xxxxxxxxx>]

Hello list!

I have a persistent problem with connection to my wireless AP.

Started with OOB ubuntu 8.04 when it was possible but after a short while  
(very seldom) up to some 20 minutes - most recent. Next step was to update  
kernel - first to PPA 2.6.25 one.
It gave me less chance to associate. Next was zen-sources. Zen driver gave  
me no chance to associate.. This situation made me to check some most  
recent iwlwifi driver via compat-wireless with no kind of success.. It's  
even worse - system freezed (even sysrq wasn't helpful) just after waiting  
about 2 minutes ow wpa_supplicant -D wext -i wlan0 -c wpa_supp.conf..  
(using 01.06.08 wireless-testing snapshot)

My hardware is typical lenovo t61 with intel 4965AGN on board. I've chosen  
intel becouse of good drivers for my previus one - ipw2200 and ipw3945.  
iwl4965 driver is different..
AP - Linksys WRT54GP2 - mix of wrt54g router + pap2 voip gateway - router  
firmware is identical (and most recent FW loaded of course).

Configuration is also typical one - visible ssid + wpa-psk encryption.

Works fine with broadcom device, with same intel under windows XP, with  
windows mobile 6, with some relatek under windows too.
Problem comes with iwl4965 under linux. It's impossible to associate.
Standard log looks like this (for kind of visualisation in BASH);

while true; do
	Trying to associate with 00:13:10:4a:c6:88 (SSID='kretyn.com' freq=2447  
MHz)
	Associated with 00:13:10:4a:c6:88
	WPA: Key negotiation completed with 00:13:10:4a:c6:88 [PTK=TKIP GTK=TKIP]
	CTRL-EVENT-CONNECTED - Connection to 00:13:10:4a:c6:88 completed (auth)  
[id=3 id_str=]
	WPA: Group rekeying completed with 00:13:10:4a:c6:88 [GTK=TKIP]
	CTRL-EVENT-DISCONNECTED - Disconnect event - remove keys
done

So.. for non bash programmers - just after "Group rekeying completed" AP  
disconnects, and this process lasts for several hours - with no effect.
I was wondering if it's wpa_supplicant bug - but after testing several  
versions - it can't be.

From funny things - using ipv6 in my home lan - sometimes wlan0 has it's  
ipv6 address, so there is communication for a short while - for example  
between "rekeying completed " and disconnected - it's about 3 seconds.

There are also many warnings in dmesg -- "iwl4965: index 255 not used in  
uCode key table."

Full debug log and dmesg are in an attachment.

Some facts:
kernel: Linux thinkpad 2.6.26-rc4-zen0 #1 SMP PREEMPT Wed May 28 03:00:38  
CEST 2008 i686 GNU/Linux
iwl module: 1.2.26ks from 01.06.2008 compat-wireless pack
ucode: iwlwifi-4965-ucode-4.44.1.20

Maybe I'm donig something wrong, maybe it's not a bug, but.. it is  
extremly irritating.. I'cant use wifi at home, but it works in every other  
location! Even today was using wpa-psk network.. based on some newer  
wrt54gl linksys AP - without any serious issues.

Thanks in advance,
Bartek

Attachment: wpa_supplicant_1.2.26ks_02.06.2008.log
Description: Binary data

Attachment: dmesg.log
Description: Binary data