Bug#628444: iwlagn - "MAC is in deep sleep", cannot restore wifi operation

["Venkataraman, Meenakshi" <meenakshi.venkataraman@intel.com>]

Hi Dafydd,

>> >> I've been seeing similar problems with my "Intel Corporation Centrino
>> >> Ultimate-N 6300".
>> >>
>> >> Like others, the problems seemed to start around 2.6.39.

[MV] Hmm...this is interesting. Can you load the iwlwifi module with bt_coex_active=0 and see if it changes anything? One of the patches that went in between 2.6.38 and 2.6.39 changed the behaviour of coexistence with Bluetooth devices on some platforms, and caused users some grief; although their symptoms were different. The module parameter I mention above solved this problem for them.

>> >Odd. What kernel did you use before then?  (/var/log/dpkg.log might
>> >tell.)
>
>Sadly, my dpkg.log only goes back to 3.0, which was installed last July
>(!).
>
>I could try installing e.g. 2.6.32 from snapshot.debian.org if other
>things don't help. But that would be a lot of patches to bisect,
>especially when reproduction iterations are so long...

[MV] No...let's leave bisecting as the last option for this problem.

>> [MV] what platform are you using? And does your problem appear after a
>system hibernate?
>
>Linux nia 3.2.0-2-amd64 #1 SMP Sun Mar 4 22:48:17 UTC 2012 x86_64
>GNU/Linux

[MV]  Oh...I was asking about hardware...who is the manufacturer of your system?

>I don't use hibernation. I do suspend regularly, but I haven't noticed any
>correlation with suspend/resume.

[MV] Interesting as well.

>> [MV] Any idea what happened before this? Did you see any error sending
>host commands? Did you resume from a hibernate? Can you send me the log?
>
>I haven't noticed any pattern. The first thing that happens is that
>the NetworkManager applet seems to be trying to reconnect to the
>wireless.

[MV] Hmm...the queue stuck patch could potentially help here, but only provided that a queue was stuck prior to the reconnect. Your log doesn't run that far back, so I'm not able to say.  :-)

Thanks,
Meenakshi