[fedora-arm] wlan0 de-activated?

[Peter Robinson]

>>> Running Fedora release 22 (Rawhide) 3.19.0-0.rc7.git3.1.fc22.armv7hl I
>>> find
>>> I have a problem with wlan0 becoming de-activated.
>>> Running headless, attempt to ssh to device. No response. Turn on monitor
>>> at
>>> device.
>>> ifconfig shows an ip address ok.
>>> cannot ping router
>>> try sudo systemctl restart network.service
>>> no change
>>> decide to ifdown/ifup wlan0
>>> system returns to normal, can then ping router and ssh to device from my
>>> laptop.
>>> journalctl for wlan0 gives results as per attached.
>>> Can anyone explain what is happening to the wlan0 device and why I have
>>> to
>>> re-activate it?
>>
>> What device?
>
> Rikomagic MK802II
>>
>> Anything in dmesg about crashes?
>
> Nothing there. No errors reported.
>>
>> It's not the firewall
>> getting in the way?
>
> This is just internal network comms. I don't think the firewall is involved.
> Would cycling the wlan0 device clear anything with the firewall?

Looking at google it looks like a Ralink8188 device, is it attached
via usb or some other manner? How is the mk802ii powered? If it's via
usb make sure it's got a 2A PSU as we had a similar issue (usb dying
after a period of time) reported here with a CubieTruck recently which
was fixed by powering the device with a more powerful power supply.

Peter