Group, I do not really know what has changed, but I can no longer maintain an ap runnning with brcmfmac on my Pis with the brcmfmac43455 chip. The firmware is current (and ahead of what RPiOS ships): [ 3.472501] brcmfmac: F1 signature read @0x18000000=0x15264345 [ 3.493274] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43455-sdio for chip BCM4345/6 [ 3.494583] usbcore: registered new interface driver brcmfmac [ 3.900038] brcmfmac: brcmf_c_process_txcap_blob: no txcap_blob available (err=-2) [ 3.901161] brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM4345/6 wl0: Oct 28 2024 23:27:00 version 7.45.286 (be70ab3 CY) FWID 01-95efe7fa I get this with the default RPiOS verison of hostapd: # hostapd -v hostapd v2.10 User space daemon for IEEE 802.11 AP management, IEEE 802.1X/WPA/WPA2/EAP/RADIUS Authenticator Copyright (c) 2002-2022, Jouni Malinen <j@xxxxx> and contributors And also with the one I built from source. The latest hostapd I could find. The git repo it is built from is from here: https://w1.fi/hostapd/ # hostapd -v hostapd v2.11-hostap_2_11+ User space daemon for IEEE 802.11 AP management, IEEE 802.1X/WPA/WPA2/EAP/RADIUS Authenticator Copyright (c) 2002-2024, Jouni Malinen <j@xxxxx> and contributors My hostapd.conf is: # cat /etc/hostapd/hostapd.conf # interface and driver interface=ap0 driver=nl80211 ht_capab=[HT40][SHORT-GI-20][DSSS_CCK-40] # WIFI-Config ssid=TestAP channel=6 hw_mode=g wmm_enabled=1 macaddr_acl=0 auth_algs=1 max_num_sta=10 # WIFI authorization wpa=2 wpa_key_mgmt=WPA-PSK wpa_pairwise=TKIP CCMP rsn_pairwise=CCMP wpa_psk_radius=0 wpa_passphrase=secret123 If there is something wrong in my setup, let me know. when I start hostapd with dnsmasq, an interface comes up and I can connect. As soon as it connects, it disconnects: Apr 20 12:57:39 pi4 systemd-networkd[181]: ap0: Gained carrier Apr 20 12:57:39 pi4 dnsmasq[169728]: started, version 2.90 cachesize 150 Apr 20 12:57:39 pi4 dnsmasq[169728]: compile time options: IPv6 GNU-getopt DBus no-UBus i18n IDN2 DHCP DHCPv6 no-Lua TFTP conntrack ipset nftset auth cryptohash DNSSEC loop-detect inotify dumpfile Apr 20 12:57:39 pi4 dnsmasq[169728]: warning: interface ap0 does not currently exist Apr 20 12:57:39 pi4 dnsmasq-dhcp[169728]: DHCP, IP range 192.168.5.2 -- 192.168.5.254, lease time 1d Apr 20 12:57:39 pi4 dnsmasq[169728]: reading /run/systemd/resolve/resolv.conf Apr 20 12:57:39 pi4 dnsmasq[169728]: using nameserver 192.168.2.253#53 Apr 20 12:57:39 pi4 dnsmasq[169728]: read /etc/hosts - 8 names Apr 20 12:57:39 pi4 hostapd[169681]: ap0: interface state UNINITIALIZED->ENABLED Apr 20 12:57:39 pi4 hostapd[169681]: ap0: AP-ENABLED Apr 20 12:57:39 pi4 resolvconf[169735]: Dropped protocol specifier '.dnsmasq' from 'lo.dnsmasq'. Using 'lo' (ifindex=1). Apr 20 12:57:39 pi4 resolvconf[169735]: Failed to set DNS configuration: Link lo is loopback device. Apr 20 12:57:39 pi4 systemd[1]: Started dnsmasq.service - dnsmasq - A lightweight DHCP and caching DNS server. Apr 20 12:57:40 pi4 kernel: brcmfmac: brcmf_cfg80211_set_power_mgmt: power save disabled Apr 20 12:57:48 pi4 kernel: ieee80211 phy0: brcmf_escan_timeout: timer expired Apr 20 12:57:48 pi4 hostapd[169681]: ap0: STA 50:84:92:a6:7a:7a IEEE 802.11: associated Apr 20 12:57:48 pi4 hostapd[169681]: ap0: STA 50:84:92:a6:7a:7a IEEE 802.11: associated Apr 20 12:57:48 pi4 hostapd[169681]: ap0: AP-STA-CONNECTED 50:84:92:a6:7a:7a Apr 20 12:57:48 pi4 hostapd[169681]: ap0: STA 50:84:92:a6:7a:7a RADIUS: starting accounting session 4336779F2221A786 Apr 20 12:57:48 pi4 hostapd[169681]: ap0: STA 50:84:92:a6:7a:7a WPA: pairwise key handshake completed (RSN) Apr 20 12:57:48 pi4 hostapd[169681]: ap0: EAPOL-4WAY-HS-COMPLETED 50:84:92:a6:7a:7a Apr 20 12:57:48 pi4 hostapd[169681]: ap0: STA 50:84:92:a6:7a:7a RADIUS: starting accounting session 4336779F2221A786 Apr 20 12:57:48 pi4 hostapd[169681]: ap0: STA 50:84:92:a6:7a:7a WPA: pairwise key handshake completed (RSN) Apr 20 12:57:48 pi4 dnsmasq-dhcp[169728]: DHCPDISCOVER(ap0) 50:84:92:a6:7a:7a Apr 20 12:57:48 pi4 dnsmasq-dhcp[169728]: DHCPOFFER(ap0) 192.168.5.214 50:84:92:a6:7a:7a Apr 20 12:57:48 pi4 dnsmasq-dhcp[169728]: DHCPREQUEST(ap0) 192.168.5.214 50:84:92:a6:7a:7a Apr 20 12:57:48 pi4 dnsmasq-dhcp[169728]: DHCPACK(ap0) 192.168.5.214 50:84:92:a6:7a:7a Apr 20 12:57:52 pi4 hostapd[169681]: ap0: STA 50:84:92:a6:7a:7a IEEE 802.11: disassociated Apr 20 12:57:52 pi4 hostapd[169681]: ap0: AP-STA-DISCONNECTED 50:84:92:a6:7a:7a Apr 20 12:57:52 pi4 hostapd[169681]: ap0: STA 50:84:92:a6:7a:7a IEEE 802.11: disassociated Apr 20 12:57:52 pi4 hostapd[169681]: ap0: STA 50:84:92:a6:7a:7a IEEE 802.11: disassociated Apr 20 12:57:52 pi4 hostapd[169681]: ap0: STA 50:84:92:a6:7a:7a IEEE 802.11: disassociated Apr 20 12:57:52 pi4 hostapd[169681]: ap0: STA 50:84:92:a6:7a:7a IEEE 802.11: disassociated Apr 20 12:57:52 pi4 hostapd[169681]: ap0: STA 50:84:92:a6:7a:7a IEEE 802.11: disassociated Apr 20 12:57:52 pi4 hostapd[169681]: ap0: STA 50:84:92:a6:7a:7a IEEE 802.11: associated Apr 20 12:57:52 pi4 hostapd[169681]: ap0: STA 50:84:92:a6:7a:7a IEEE 802.11: associated Apr 20 12:57:52 pi4 hostapd[169681]: ap0: AP-STA-CONNECTED 50:84:92:a6:7a:7a Apr 20 12:57:52 pi4 hostapd[169681]: ap0: STA 50:84:92:a6:7a:7a RADIUS: starting accounting session 33CFF844DBBE630F Apr 20 12:57:52 pi4 hostapd[169681]: ap0: STA 50:84:92:a6:7a:7a WPA: pairwise key handshake completed (RSN) Apr 20 12:57:52 pi4 hostapd[169681]: ap0: EAPOL-4WAY-HS-COMPLETED 50:84:92:a6:7a:7a Apr 20 12:57:52 pi4 hostapd[169681]: ap0: STA 50:84:92:a6:7a:7a RADIUS: starting accounting session 33CFF844DBBE630F Apr 20 12:57:52 pi4 hostapd[169681]: ap0: STA 50:84:92:a6:7a:7a WPA: pairwise key handshake completed (RSN) Apr 20 12:57:52 pi4 dnsmasq-dhcp[169728]: DHCPDISCOVER(ap0) 50:84:92:a6:7a:7a Apr 20 12:57:52 pi4 dnsmasq-dhcp[169728]: DHCPOFFER(ap0) 192.168.5.214 50:84:92:a6:7a:7a Apr 20 12:57:52 pi4 dnsmasq-dhcp[169728]: DHCPREQUEST(ap0) 192.168.5.214 50:84:92:a6:7a:7a Apr 20 12:57:52 pi4 dnsmasq-dhcp[169728]: DHCPACK(ap0) 192.168.5.214 50:84:92:a6:7a:7a Apr 20 12:57:57 pi4 hostapd[169681]: ap0: STA 50:84:92:a6:7a:7a IEEE 802.11: disassociated Apr 20 12:57:57 pi4 hostapd[169681]: ap0: AP-STA-DISCONNECTED 50:84:92:a6:7a:7a Apr 20 12:57:57 pi4 hostapd[169681]: ap0: STA 50:84:92:a6:7a:7a IEEE 802.11: disassociated Apr 20 12:57:57 pi4 hostapd[169681]: ap0: STA 50:84:92:a6:7a:7a IEEE 802.11: disassociated Apr 20 12:57:57 pi4 hostapd[169681]: ap0: STA 50:84:92:a6:7a:7a IEEE 802.11: disassociated Apr 20 12:58:11 pi4 hostapd[169681]: ap0: interface state ENABLED->DISABLED Apr 20 12:58:11 pi4 systemd[1]: Stopping hostapd.service - Hostapd IEEE 802.11 AP, IEEE 802.1X/WPA/WPA2/EAP/RADIUS Authenticator... Apr 20 12:58:11 pi4 hostapd[169681]: ap0: AP-DISABLED Apr 20 12:58:11 pi4 hostapd[169681]: ap0: CTRL-EVENT-TERMINATING Apr 20 12:58:11 pi4 hostapd[169681]: nl80211: deinit ifname=ap0 disabled_11b_rates=0 Apr 20 12:58:11 pi4 systemd-networkd[181]: ap0: Lost carrier Apr 20 12:58:11 pi4 systemd[1]: hostapd.service: Deactivated successfully. Apr 20 12:58:11 pi4 systemd[1]: Stopped hostapd.service - Hostapd IEEE 802.11 AP, IEEE 802.1X/WPA/WPA2/EAP/RADIUS Authenticator. Apr 20 12:58:12 pi4 systemd[1]: Stopping dnsmasq.service - dnsmasq - A lightweight DHCP and caching DNS server... Apr 20 12:58:12 pi4 resolvconf[170375]: Dropped protocol specifier '.dnsmasq' from 'lo.dnsmasq'. Using 'lo' (ifindex=1). Apr 20 12:58:12 pi4 resolvconf[170375]: Failed to revert interface configuration: Link lo is loopback device. Apr 20 12:58:12 pi4 dnsmasq[169728]: exiting on receipt of SIGTERM Apr 20 12:58:12 pi4 systemd[1]: dnsmasq.service: Deactivated successfully. Apr 20 12:58:12 pi4 systemd[1]: Stopped dnsmasq.service - dnsmasq - A lightweight DHCP and caching DNS server. Apr 20 12:58:12 pi4 systemd-networkd[181]: ap0: Link DOWN Apr 20 12:58:12 pi4 kernel: ieee80211 phy0: brcmf_cfg80211_get_channel: chanspec failed (-52)
