iwn0 hangs randomly when starting the machine

[Sean Bruno]

On Mon, 2014-03-31 at 07:30 +0800, Erich Dollansky wrote:
> Hi,
> 
> since I upgraded to r263767, I have the following problem:
> 
> Wireless does not start all the while. When it does not start, it hangs
> then forever. wpa_supplicant's state in top is then '-'. If I start
> wpa_supplicant by hand, it will hang and it cannot be stopped by
> control C. The light indicating that wireless is up is never on in this
> case. Rebooting the machine solves the problem. I did not find any
> other way to solve as the wireless related commands will hang.
> 
> When the wireless network comes up, I can work just normal.
> 
> Erich
> 
> PS:
> 
> The hardware:
> 
> iwn0: <Intel Centrino Advanced-N 6205> mem 0xf2500000-0xf2501fff irq 17
> at device 0.0 on pci3

Hrm ... so I have this one in my T520.

I've been experimenting with routers and such ... and I found something
*interesting* with iwn(4).

On my dlink dir825-C1 I have a channel option "HT20/40 Coexistence".  If
I disable this, I cannot associate in the 2.4G hz channel at all.  I
don't know if this is clueful, but it seems to mirror my problems at
work.  Associates for a moment and then drops.

Since I don't know what this really means, I thought I'd chuck it over
here and see if its meaningful.

sean
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