Hi, I've noticed some funny behavior on brcmfmac STA's when issuing a channel switch to hostapd. First, I tried this on a really old brcmfmac card. This got stuck in a loop: DEL_STATION, NEW_STATION, TX_STATUS, ROAM (repeat). I chalked it up to the card being old and unsupported. I then tried on a rpi3 and would get disconnected soon after issuing the channel switch to hostapd. No other events came, just a disconnect. In one case I issued a channel switch and saw hostapd responding to SA Query requests about once a second. But no other events came on the STA side. The card/FW seemed to be stuck in a loop sending SA Queries once per second but never issued a CHANNEL_SWITCH or ROAM event. This went on for about 5 minutes before I stopped the tests. If channel switching is not supported I think the disconnect behavior I saw is about all that can be done. As for the SA query loop, that seems like a bug to me. Thanks, James
