20/40 coex is supposed to be some corner of the spec that notices
whether there's a 20mhz only AP on the extension channel and if so,
flip everyone over to 20MHz.

Is your DIR825 2GHz channel set to 20mhz or 40mhz?


On 8 April 2014 18:18, Sean Bruno <sbr...@ignoranthack.me> wrote:
> 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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