Hey, is it possible that something is broken with powersave mode? I frequently have connection stalls up to hangs with the N770 that go away when I either continually ping from the beginning of the connection or do something from the N770 instead of from the laptop that is functioning as the AP. The logs also sometimes contain many messages [17145.100011] Buffered frame expired (STA <mac addr>) which leads me to believe that the N770 enters powersave mode but starting to ping it after it has entered PS mode doesn't wake it up from PS mode. I can see beacons using my zd1211 device as monitor, but none of them has anything in the TIM bitmap. However, zd1211 seems to not show me any non-broadcast frames in monitor mode right now so I can't verify at the moment whether the N770 does or doesn't go into powersave mode, I don't see it locally on the monitor interface but it might actually be negotiating powersave mode with the firm/hardware in bcm43xx... I'll keep digging, but if somebody has any idea if/how the powersave code works let me know where to look. johannes
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