Every few weeks I have to restart the 2.4 GHz radio or reboot my Archer C7 v2 router otherwise no client can connect to it.
All stations end up being "deauthenticated due to inactivity" and can't reconnect.
Tested on OpenWRT 18.06.4. It is quite hard to reproduce for me as it doesn't happen frequently.
this is a pretty irritating bug, and the reproduction of it is something i have not either been able to do on cue.
on my Archer C7 v2 it happens very random, some times it "hangs" the 2.4 GHz radio once a week, sometimes it only takes a few days, and the longest running working is more then a month, by that time i was sure the issue was gone (right after flash of 18.06.2) but then it slowly started to randomly drop connection to the radio.
worth noting the 5 GHz radio never does this so its a contained issue to the 2.4 GHz. probably driver related?
i have tested it with: 17 (Lede) and 18.06 all point versions tested with same issue, and the time it takes are never the same, so it feels random.
i have thought of deploying a counter measure to run a scripted interface restart of the 2.4 GHz every week. i know its wrong to work around the problem and not fixing it but this issue seems to live on forever.
mocked up a quick test, and can put it up on github after i clean it up, if its needed by anyone else..
pretty simple, enable cron, run it every 15 minutes and check if any wifi interface missing connected clients, then it just restarts wifi. missing the only restart only 2.4GHz interface right now, but thats cause this was more a internal test dummy for now..
I see a similar problem with TL-WR1043ND v2 which also use QCA9558. We are running a medium sized network with many clients coming and going all the time and this bug seems to happen every couple of days.
It kind of would be nice if someone actually posted whatever script @bjorns86 is talking about above, since this is still very much an issue right up into v21. But I have no idea why a) it's not linked in this thread and b) where else it might be.