I'm sending this with the subject of the bug reported before in hope it will join the thread even though I'm seeing this with an iwm(4) interface. I'm running a Nov 3 snap of -current.
The messages seem mostly harmless as the interface recovers without prodding. iwm0 at pci0 dev 20 function 3 "Intel AC 9560" rev 0x11, msix iwm0: hw rev 0x310, fw ver 46.ff18e32a.0, address 50:e0:85: iwm0: flags=808843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,AUTOCONF4> mtu 1500 lladdr 50:e0:85: index 1 priority 4 llprio 3 groups: wlan egress media: IEEE802.11 autoselect (VHT-MCS0 mode 11ac) status: active ieee80211: join XXX chan 153 bssid 66:22:32: 97% wpakey wpaprotos wpa2 wpaakms psk wpaciphers ccmp wpagroupcipher ccmp inet 192.168.0.101 netmask 0xffffff00 broadcast 192.168.0.255 % grep iwm /var/log/messages Dec 20 09:23:19 lenny /bsd: iwm0: unhandled firmware response 0x3fd/0x3800000c rx ring 0[198] Dec 20 11:03:23 lenny /bsd: iwm0: unhandled firmware response 0x3fd/0x3800000c rx ring 32[143] Dec 20 12:19:53 lenny /bsd: iwm0: unhandled firmware response 0x3fd/0x3800000c rx ring 19[216] Dec 20 13:01:56 lenny /bsd: iwm0: unhandled firmware response 0x3fd/0x3800000c rx ring 30[46] Dec 20 13:26:17 lenny /bsd: iwm0: unhandled firmware response 0x3fd/0x3800000c rx ring 19[171] Dec 20 13:33:17 lenny /bsd: iwm0: unhandled firmware response 0x3fd/0x3800000c rx ring 54[207] Dec 20 13:52:30 lenny /bsd: iwm0: fatal firmware error Dec 20 13:52:45 lenny /bsd: iwm0: unhandled firmware response 0x3fd/0x3800000c rx ring 1[7] Thanks Greg