Re: rt73usb not working since linux 3.4

[Andreas Messer <andi@bastelmap.de>]

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Hello Again,

Am Dienstag, 26. Juni 2012, 13:18:35 schrieb John W. Linville:
> On Tue, Jun 26, 2012 at 06:03:56PM +0200, Andreas Messer wrote:
> > Dear all,
> > 
> > updating my pc from linux kernel 3.3 to linux kernel 3.4 broke my wlan.
> > I'm
> > using rt2571 based wlan module from qcom: LR802UKG, which is wired to an
> > internal usb port of my media center pc. The rfkill switch is hardwired to
> > make wlan active all the time. This setup is (almost) properly working
> > since about three years now. (If i ignore the occasional
> > vendor_request_error things)
> > The wlan device now refuses to go
> > online, saying that the kill switch is active, which of course can not be
> > as it is working with linux kernel 3.3.
> > [...]
> > So, what can I do to track down the problem?
> 
> Andreas,
> 
> Hmmm...well, perhaps you can start by doing a git bisect to narrow-down
> the commit that started this problem for you?  It may take serveral
> iterations, if you can only narrow it down to 3.3 working and 3.4 not
> working.  But, at least that should point us in the right direction.
> 
> John

first of all, sorry for the long delay. After some hours of compiling and 
checking, I have found the following things: The problem is introduced 
somewhere between v3.3.8 and v3.4, actually the commit 7e29629 already shows 
the problem. So range is v3.3.8...7e29629. I thing there is something wrong 
with initialization of the chip because of the following behaviour: If I boot 
from power-off into 7e29629 the kill switch reports to be in state 1 
(/sys/../hard = 1). If I first boot into 3.3.8 and afterwards re-boot into 
7e29629, the kill switch reports to be in state 0 and the WLAN connection 
builds up properly.
Hope that helps somehow.

Cheers,
Andreas

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