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:

quoted

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