ath20k blocks other devices

[Anton Romanov]

I just tested and indeed - once I connect to my 5Ghz AP with ath10k,
my phone loses connection to it and can no longer reestablish it
unless I disconnect ath10k.

(Asus RT-AC66R, Alienware 15 N1525 QCA6174, kvalo's tree)

On Fri, May 15, 2015 at 3:52 AM, Eduardo Costa <eu at ejcosta.info> wrote:
> Hi,
> Just to share that this is not an isolate case, I suffer from the
> exact same problem with a Clevo P751ZM laptop and a Linksys WR610N v1
> router.
> I'll try to help, adding debug info to this thread, as soon as I can.
>
>
> On Fri, May 15, 2015 at 11:25 AM, Michal Kazior <michal.kazior at tieto.com> wrote:
>> On 15 May 2015 at 12:07, Brummfax <brummfax at posteo.org> wrote:
>>> Hi everybody,
>>>
>>> I bought a new Acer Aspire VN7-571G for my parents. As the new QCA6174
>>> Qualcomm Atheros Wifi/bluetooth (also known as QCNFA344) device is in
>>> use, I could not use Wifi with the usual Ubuntu 15.04 installation.
>>> Following
>>> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1383184/comments/115 I
>>> compiled the new kernel with the ath10k driver and everything worked
>>> nicely at home with my Fritzbox 7490 router using the 5GHz band. At my
>>> parents place with a Fritzbox 3170 router I encounter the following
>>> problem. As soon as Ubuntu is connected to Wifi (using the 2,4 GHz band
>>> as there is no 5GHz band), other devices cannot connect to Wifi anymore.
>>> The ath10k driver blocks all other devices (Smartphones running Android,
>>> iPads) except for my personal laptop with a standard Ubuntu 14.10 system
>>> which can connect to Wifi for a couple of minutes before being
>>> disconnected as well. I can connect again but  will loose the connection
>>> after a couple of minutes. I've also installed Windows 8.1 on the Acer
>>> Aspire, and if I connect to Wifi using Windows, these problems
>>> disappear, i.e. all other devices can also connect to Wifi without any
>>> problems. I've also not seen these problems at home which could be
>>> related to the fact that the Acer Aspire was using the 5GHz band while
>>> the other devices where using the 2,4GHz band.
>>
>> Can you get some sniff logs and possibly wpa_supplicant verbose logs
>> from, e.g. another linux-based client? At this point I don't have any
>> data to draw conclusions from. Is the network encrypted? Can you try
>> seeing if open network also yields the same behaviour?
>>
>> Logs/traces from ath10k client itself would be also helpful. You can
>> read more about getting these here:
>> https://wireless.wiki.kernel.org/en/users/drivers/ath10k/debug#tracing
>>
>>
>>> Running "cat /var/log/syslog | grep ath10k" after installation, I got 3
>>> errors because of missing firmware:
>>> /lib/firmware/ath10k/QCA6174/hw2.1/board-pci-168c:003e:105b:e08e.bin
>>> /lib/firmware/ath10k/QCA6174/hw2.1/firmware-5.bin
>>> lib/firmware/ath10k/cal-pci-0000:03:00.0.bin
>>>
>>> The first two messages disappeared after running
>>> sudo cp board.bin  board-pci-168c:003e:105b:e08e.bin
>>> sudo cp firmware-4.bin firmware-5.bin
>>> in the /lib/firmware/ath10k/QCA6174/hw2.1-directory. I could even delete
>>> board.bin and firmware-4.bin without loosing Wifi connectivity. At the
>>> moment these files are still there, but seem to be useless. Nevertheless
>>> "modinfo ath10k_pci" shows that only board.bin and firmware-4.bin from
>>> the hw2.1-directory are used. Very strange! I use the firmware extracted
>>> from my Windows installation using firmware provided by Acer's support
>>> page.
>>
>> There's a slight bug in firmware file advertisement in ath10k_pci
>> hence modinfo tells you firmware-4.bin is the latest support for
>> qca6174 while firmware-5.bin for qca988x. This is incorrect - both
>> chips support firmware-5.bin in the ath10k git master branch. ath10k
>> tries to load newer firmware binaries first and falls back to older.
>> Nothing to worry about now though.
>>
>>
>> Michał
>>
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>
>
>
> --
> ECosta
>
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