Date: Tue, 29 Sep 2009 20:54:00 -0700 From: Sam Leffler <sam@freebsd.org> To: Alex Dupre <ale@freebsd.org> Cc: freebsd-current@freebsd.org Subject: Re: Atheros 9280 issue Message-ID: <4AC2D658.8070908@freebsd.org> In-Reply-To: <4AC1ABE5.6090409@FreeBSD.org> References: <4AC0BB4A.40201@FreeBSD.org> <4AC17F33.80800@freebsd.org> <4AC1ABE5.6090409@FreeBSD.org>
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Alex Dupre wrote: > Sam Leffler wrote: >>> Clients can connect to the AP, but obviously packets are dropped every >>> time the card is reset. >> >> How do you know packets are dropped? Nothing should be lost. > > I'm pinging the access point from an associated wifi client: when this > message appears one or two pings are lost. Previously, when such > messages didn't appear, no pings were lost. Maybe the reply timeouts and > is not completely lost, I'll do more tests asap. I thought reset didn't lose any frames but perhaps not. athdebug reset should (I think) tell you if frames are lost. > >> "every few seconds" is not helpful. > > Actually the timing is highly variable, it may happen once a second, > like once every 15 seconds or more. Usually (in the two hours I tried) > every 2-5 seconds. > >> Look for something else in the >> system that coincides w/ your msgs. It's possible that periodic >> calibration done by the driver has a bad effect; you can turn it off by >> setting a sysctl (look at sysctl -a and/or the driver code). > > hw.ath.shortcal = 0, right? > > I'll try, I haven't done additional tests before knowing what would be > useful for debugging. Actually it looks like hw.ath.longcal=0 is what you want. Sam
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