linux-kernel - 2.6.27-rc1: zd1211rw association fails

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Message-Id: <200807291049.47342.alistair@devzero.co.uk>
Date:	Tue, 29 Jul 2008 10:49:47 +0100
From:	Alistair John Strachan <alistair@...zero.co.uk>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	dsd@...too.org, kune@...ne-taler.de, linux-wireless@...r.kernel.org
Subject: 2.6.27-rc1: zd1211rw association fails

Hi,

Just tried switching to 2.6.27-rc1 on my desktop, with a supported zd1211rw
device, and my wireless AP does not "authenticate". With 2.6.26 (the only
previous working version tested) I get the following in dmesg:

[   17.481900] firmware: requesting zd1211/zd1211b_ub
[   17.536820] firmware: requesting zd1211/zd1211b_uphr
[   17.601837] zd1211rw 1-2:1.0: firmware version 4725
[   17.602837] zd1211rw 1-2:1.0: zd1211b chip 050d:705c v4810 high 00-17-3f AL2230_RF pa0 g--NS
[   18.613540] wlan0: Initial auth_alg=0
[   18.613540] wlan0: authenticate with AP 00:17:3f:a4:d6:9d
[   18.622538] wlan0: RX authentication from 00:17:3f:a4:d6:9d (alg=0 transaction=2 status=0)
[   18.622538] wlan0: authenticated
[   18.622538] wlan0: associate with AP 00:17:3f:a4:d6:9d
[   18.622538] wlan0: RX AssocResp from 00:17:3f:a4:d6:9d (capab=0x461 status=0 aid=2)
[   18.622538] wlan0: associated
[   18.622538] wlan0: switched to short barker preamble (BSSID=00:17:3f:a4:d6:9d)

Which is correct. One perhaps interesting detail is that the AP is unencrypted,
here is what iwlist wlan0 scanning sees:

wlan0     Scan completed :
          Cell 01 - Address: 00:17:3F:A4:D6:9D
                    ESSID:"strachan"
                    Mode:Master
                    Channel:6
                    Frequency:2.437 GHz (Channel 6)
                    Quality=100/100  Signal level=44/100
                    Encryption key:off
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 22 Mb/s
                              6 Mb/s; 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s
                              36 Mb/s; 48 Mb/s; 54 Mb/s
                    Extra:tsf=00000036b0f6e1b6

However, on 2.6.27-rc1 I see the following instead:

[   12.120189] firmware: requesting zd1211/zd1211b_ub
[   12.166388] firmware: requesting zd1211/zd1211b_uphr
[   12.218877] zd1211rw 4-2:1.0: firmware version 4725
[   12.258877] zd1211rw 4-2:1.0: zd1211b chip 050d:705c v4810 high 00-17-3f AL2230_RF pa0 g--NS
[   13.097289] wlan0: authenticate with AP 00:17:3f:a4:d6:9d
[   13.296890] wlan0: authenticate with AP 00:17:3f:a4:d6:9d
[   13.496890] wlan0: authenticate with AP 00:17:3f:a4:d6:9d
[   13.696886] wlan0: authentication with AP 00:17:3f:a4:d6:9d timed out

And Debian's networking script fails to obtain an IP address. I notice the line:

[   18.613540] wlan0: Initial auth_alg=0

Is missing from the 2.6.27-rc1 dmesg, however my config should not have been
altered (I simply make oldconfig'ed it). Find attached anyway.

I'll start a bisection if nobody has any immediate ideas.

-- 
Cheers,
Alistair.

View attachment ".config" of type "text/plain" (47974 bytes)