On Wed, 2010-01-27 at 19:06 +0100, Michael Pronath wrote:

> I had the same problem with the DWA-547 that I bought yesterday.  The 
> system freezes deterministically everytime when I enter the WPA2 
> password in nm-applet.  The next time booting, nm-applet had the 
> password saved and tries to connect right away, hence it freezes before 
> the Desktop is fully up.  It is a 64bit Linux installation of Ubuntu 
> 9.10, updated yesterday.

A fix for AR9220 (or generally any PCI card with AR92xx chipset that is
not capable of working in the 5 GHz band) was committed to
wireless-testing two days ago.

> I just booted from a 32bit Ubuntu 9.10 CD; then it works and doesn't 
> freeze. So I assume it's a problem with the ath9k driver specifically in 
> the 64bit kernel. Now I'll replace my 64bit installation with the 32bit 
> one, as I have no reason to run 64bit Linux anyway.

Well, it may be a different problem, as the initialization was wrong on
32-bit kernels too.  But I cannot be sure that incorrect initialization
would prevent the card from working every time.

Anyway, it should be possible to try the fix by using the current
compat-wireless:

http://wireless.kernel.org/download/compat-wireless-2.6/compat-wireless-2.6.tar.bz2

-- 
Regards,
Pavel Roskin
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