[ath9k-devel] TPlink TL-WN822Nv2 drops out connections randomly on Arch Linux with Kernel 3.12.1-3

[Oleksij Rempel <linux@rempel-privat.de>]

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Am 02.12.2013 19:27, schrieb Mark E. Lee:
> 
> 
> On Sun, 2013-12-01 at 10:30 +0100, Oleksij Rempel wrote:
>> Finally i found a router to reproduce this or similar issue. It 
>> is dlink dir-615 H1... (there is much more problems with it) In 
>> my case it is ath9k-htc firmware issue, so it will take some
>> time to debug it.
>> 
>> Am 01.12.2013 04:20, schrieb Mark E. Lee:
>>> 
>>> -----Original Message----- From: Oleksij Rempel 
>>> <linux@rempel-privat.de> To: Mark E. Lee <mark@markelee.com>, 
>>> ath9k-devel at lists.ath9k.org Subject: Re: [ath9k-devel] TPlink 
>>> TL-WN822Nv2 drops out connections randomly on Arch Linux with 
>>> Kernel 3.12.1-3 Date: Sat, 30 Nov 2013 08:57:07 +0100
>>> 
>>> Am 30.11.2013 05:40, schrieb Mark E. Lee:
>>>>> Salutations,
>>>>> 
>>>>> I am still having an error with my TPLINK TL-WN822N V.2 
>>>>> using Arch Linux (64bit) Kernel 3.12.1-3. This issue has 
>>>>> persisted since I got the adapter (since kernel 3.8.4). 
>>>>> When examining my network router's log, I found I was 
>>>>> getting the error: [WLAN access rejected: incorrect 
>>>>> security]
>>>>> 
>>>>> Sometimes the usb adapter not only disconnects from the 
>>>>> internet, but it also seems to poweroff. I set up a script 
>>>>> to disable autosuspend for the usb wifi adapter and to 
>>>>> reload the ath9k_htc module (see below). This still
>>>>> doesn't stop the adapter from turning off though. Any
>>>>> help?
>>>>> 
>>>>> ---- #!/bin/bash
>>>>> 
>>>>> main() {  ## main insertion function ping-daemon & ## fork
>>>>> and run the ping daemon }
>>>>> 
>>>>> ping-daemon() {  ## daemon to ping and restart the network 
>>>>> adapter while :; do ping -c 1 192.168.1.1 &> /dev/null ||
>>>>> ( ## ping the router id="$(lsusb | awk '/TP-Link/ {print 
>>>>> $2}')"; echo "on" > \ 
>>>>> /sys/bus/usb/devices/usb${id//00/}/power/level;  ## tell 
>>>>> the kernel to always leave the usb adapter on rmmod 
>>>>> ath9k_htc;                                  ## remove the 
>>>>> wifi adapter driver modprobe ath9k_htc; ## load the wifi
>>>>> adapter driver ) sleep 1m; ## pause for 1 minute done; }
>>>>> 
>>>>> main; ## run the main insertion function ----
>>>>> 
>>>> Hi Mark,
>>>> 
>>>> so... router decided to kick you out. Why? It has some 
>>>> security configurations which made this decision. Incorrect 
>>>> key? too many packed on different IPs?
>>>> 
>>>> Please send your dmesg with reconnections. May be it will 
>>>> provide us some interesting info.
>>>> 
>>>> 
>>> 
>>> Salutations,
>>> 
>>> I have attached my dmesg log to this email. There may be some 
>>> excess stuff inside.
>>> 
>>> Regards, Mark
>>> 
>> 
>> 
> 
> Salutations,
> 
> I got a new error (when the wifi adapter shuts off and can't seem 
> to recover even when replugging in the device).
> 
> --- [63351.157325] DMA: Out of SW-IOMMU space for 16 bytes at 
> device 0000:00:1d.0

It is not firmware issue. In all errors i had, replugging will recover
it. In your case it sounds more like usb controller.
Beside, what is your usb controller?

- -- 
Regards,
Oleksij
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