Hi Loganaden,

this sounds somewhat familiar to me (see https://bugs.lede-project.org/index.php?do=details&task_id=176 ). At least the symptoms are similar and so is the temporary remedy (calling wifi on the CLI). Are you using LEDE firmwares as well? In my case it seems bad radio conditions help expose the issue somewhat easier... My current idea is that r1482 (commit 372d0fea29e60b02154fd7176ba32e7742f6640e, ' ath9k: add a bunch of powersave handling fixes') somehow introduced a new or exposed an old and hidden bug for the atheros radios, r1483 (commit a894a535ff7e6c37bd853e951663130482bc0ff2, 'mac80211: add fixes for dealing with unexpected BlockAck frames') might either have introduced an easier way to trigger the offensive conditions, but that is conjecture...

Best Regards

Sebastian

Gesendet: Sonntag, 18. September 2016 um 16:24 Uhr
Von: "Loganaden Velvindron" <loganaden@gmail.com>
An: "Dave Taht" <dave.taht@gmail.com>
Cc: make-wifi-fast@lists.bufferbloat.net
Betreff: Re: [Make-wifi-fast] crypto-fq bug postmortem is up

On the tp-link archer c7 v2, and toke's firmware, I hit a non reproducible bug:

After running flent a couple of times, the wifi stops working. It's no
longer reachable.

I was using whatsapp a few minutes ago, when the same thing happened.

I can narrow it down to the wifi (bgn), because when I disable the
wifi interface via luci, and re-enable it, wifi works properly.
Unfortunately, there are no relevant messages in the kernel or system
log. I'm using wpa-psk (ccmp) for encryption.
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