Date: Sun, 7 Sep 2014 08:28:54 -0700 From: Adrian Chadd <adrian@freebsd.org> To: Nathan Whitehorn <nwhitehorn@freebsd.org> Cc: "freebsd-wireless@freebsd.org" <freebsd-wireless@freebsd.org> Subject: Re: Issues with urtwn Message-ID: <CAJ-VmokyPcS077wHiP4Mdetms=meqk47v29fKA1edidhorVQpg@mail.gmail.com> In-Reply-To: <540C751F.6050202@freebsd.org> References: <540C751F.6050202@freebsd.org>
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On 7 September 2014 08:09, Nathan Whitehorn <nwhitehorn@freebsd.org> wrote: > I've been having some issues with connection stability in urtwn for several > months. The usual symptom is that after some period of time the connection > will apparently stall. If I'm running ping continuously, for instance, it > will at some point stop receiving replies. Then, sometime later, immediately > if I use the "reassociate" command in wpa_cli, the connection will fix > itself and all the packets I didn't get earlier get delivered at once: > hundreds of ping replies, for instance, some with time stamps minutes in the > past. No data is actually lost, though. > > I think the issue is that the driver does not actually support powersave > mode (maybe it should?) but reports to the AP that it does: > >> ifconfig wlan0 list sta (this is on the AP) > ADDR AID CHAN RATE RSSI IDLE TXSEQ RXSEQ CAPS FLAG > 80:1f:02:cc:47:a9 1 11 11M 8.5 0 5526 55712 EPS AE RSN > > I don't know enough about wireless to fix this, but the AP waiting for a > powersave poll and never getting one seems consistent with the problem. Is > there a simple way just to disable advertising this? When it next stalls, check ifconfig wlan0 and ifconfig urtwn0 - see if OACTIVE is set. I know iwn and ath had problems in the past where OACTIVE handling was plain broken (wasn't behind locks) and in an SMP, preemptive world things got gunked up. -a
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