Trouble with multiple cards

[Michal Kazior]

On 4 April 2016 at 13:26, Matthew Keeler <mjkeeler7 at gmail.com> wrote:
>
> I have been running two QCA9880 based cards for a couple of months now. Recently I needed to update some packages on the router and reboot and ever since I have not been able to get both working again. I have tried downgrading the packages (although none were related to the kernel/driver or the firmware to no avail.

Can you list what packages were updated, please?


> Cards: Airetos AEX-QCA988-NX
> System: Arch Linux with kernel 4.4.5
> Firmwares tried: Everything from 10.2.4.70.9-2 through 10.2.4.70.31-2
>
> The symptoms are that upon boot most of the time one of the two cards doesn’t think it can/should transmit on any 5GHz frequency (I haven’t seen the issue with 2.4GHz frequency band). With dmesg I can see two sets of logs about the EEPROM regdomain being 0x0 and it eventually setting my regulatory domain to 0x3a US. iw reg get also confirms that both cards have the right US regulatory domain. One thing which does sometimes clear it up is to "rmmod ath10k_pci ath10k_core && modprobe ath10k_pci”. It doesn’t work every time though.

Smells like regulatory problem, not ath10k per se.


> So 1) Should 2 ath10k cards coexist properly and 2) Has anyone seen similar behavior and know how to fix it.

This should work fine.

Can you post kernel logs when it works/breaks? Do you have CRDA
installed/up-to-date? Can you try checking output of `iw reg get` when
it works/breaks?


Michał