>> Running Fedora release 22 (Rawhide)
>> I have a problem with wlan0 becoming de-activated.
>> Running headless, attempt to ssh to device. No response. Turn on monitor
>> 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
>> journalctl for wlan0 gives results as per attached.
>> Can anyone explain what is happening to the wlan0 device and why I have
>> re-activate it?
> What device?
> 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.