Please compile your kernel with IEEE80211_DEBUG, then enable debugging - wlandebug +state +power
You can disable powersave with 'ifconfig wlan0 -powersave', but it shouldn't be enabled by default. -a On 8 September 2014 15:14, Nathan Whitehorn <nwhiteh...@freebsd.org> wrote: > So it's definitely to do with powersave. Here's a bunch of iterations of > ifconfig list sta on my laptop: > ADDR AID CHAN RATE RSSI IDLE TXSEQ RXSEQ CAPS FLAG > 54:78:1a:a0:91:22 149 1 54M 37.0 0 4385 37104 EPS A HTCAP > RSN WME > ADDR AID CHAN RATE RSSI IDLE TXSEQ RXSEQ CAPS FLAG > 54:78:1a:a0:91:22 149 1 54M 37.5 0 4412 39360 EPS A HTCAP > RSN WME > ADDR AID CHAN RATE RSSI IDLE TXSEQ RXSEQ CAPS FLAG > 54:78:1a:a0:91:22 149 1 54M 37.5 0 4417 39360 EPS AP HTCAP > RSN WME > ADDR AID CHAN RATE RSSI IDLE TXSEQ RXSEQ CAPS FLAG > 54:78:1a:a0:91:22 149 1 54M 37.5 0 4417 39360 EPS AP HTCAP > RSN WME > ADDR AID CHAN RATE RSSI IDLE TXSEQ RXSEQ CAPS FLAG > 54:78:1a:a0:91:22 149 1 54M 37.5 0 4417 39360 EPS AP HTCAP > RSN WME > > You can see the connection die on the third line, when the txseq and rxseq > counters stop incrementing and 'P' gets added to the FLAG field. Does this > mean the AP has turned on powersave on its end? > -Nathan > > > On 09/07/14 14:07, Adrian Chadd wrote: >> >> Hi, >> >> The way it's supposed to work in the legacy 802.11 powersave world is >> that you send a/any data frame with the powermgt bit in the 802.11 >> header set to 0 and the AP goes "oh they're awake!" and sends you your >> buffered frames. >> >> By default powersave isn't enabled, so we should never be _telling_ >> the AP that we're going to sleep and the stack always sends data >> frames with pwrmgt=0. >> >> You can ensure it's disabled by ifconfig wlan0 -powersave >> >> The code in -HEAD that manages that is in ieee80211_power.c. I added >> an explicit powersave support mode for NICs that need it done for them >> - and the only one it's enabled for right now is ath(4). >> >> The only reason net80211 sends pwrmgt changes outside of having >> net80211 power save enabled is the background scan code. >> >> I'd compile in IEEE80211_DEBUG in your kernel, then I'd use wlandebug >> +scan to see if somehow there's some scanning going on; and wlandebug >> +power to see if any power save transitions occur. >> >> Are you absolutely sure it's a receive side buffering problem, rather >> than a send side problem? >> >> It's also possible that the NIC stops receiving and the AP treats that >> as "oh ok, they've gone to sleep for a while." ath(4) now does this in >> hostap mode. >> >> >> -a >> > _______________________________________________ freebsd-wireless@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-wireless To unsubscribe, send any mail to "freebsd-wireless-unsubscr...@freebsd.org"
