ath20k blocks other devices

[Eduardo Costa]

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