> I also have this issue with AC 3160. What i did as a workaround was to switch > iwm to 802.11g using > ifconfig iwm0 media autoselect mode 11g
Excellent! That got my wireless interface working without error messages. As far as I haven’t had a single firmware error in two hours. I haven’t tested the download speed because I don’t have anything to compare it to, but it’s more than sufficient for my purposes. Thank you.