Hi, I am attempting to address a problem in which the wpa_supplicant does not appear to detect the loss of association with an access point. The problem is intermittent and does not happen consistently. However, when it does happen the system on which wpa_supplicant is running does not recover and manual intervention is necessary. Manual intervention involves disconnecting wpa_supplicant from the AP, and then reconnecting to the AP. In debugging the problem we looked at the state of the wifi connection by using iwconfig which indicates that the wlan0 interface is not-associated. This is consistent with the output from the ip link command which also indicates that the wlan0 is "DOWN". However, if we use D-feet to examine the properties of fi.w1.wpa_supplicant1.Interface we find that it believes that it is associated with the wifi AP. Further, there are no indications in the journalctl log file suggest that wpa_supplicant is seeing the disconnection and trying to reestablish it. I am looking for suggestions as to how to further identify what is causing the problem, and suggestions for work arounds that will allow the Raspberry PI-3 to remain online. The testing is being done using wpasupplicant 2.3, on a Raspberry PI-3 running Raspian version 8 (Jessie) and Linux kernel 4.4.10-v7+ A segment of the journalctl output, starting at the detection of the lost carrier is below: May 27 10:05:58 raspberrypi systemd-networkd[1032]: wlan0 : lost carrier May 27 10:05:58 raspberrypi systemd-networkd[1032]: wlan0 : DHCP lease lost May 27 10:05:58 raspberrypi avahi-daemon[402]: Withdrawing address record for 192.168.0.106 on wlan0. May 27 10:05:58 raspberrypi avahi-daemon[402]: Leaving mDNS multicast group on interface wlan0.IPv4 with address 192.168.0.106. May 27 10:05:58 raspberrypi avahi-daemon[402]: Interface wlan0.IPv4 no longer relevant for mDNS. May 27 10:05:58 raspberrypi wpa_supplicant[807]: wlan0: CTRL-EVENT-REGDOM-CHANGE init=CORE type=WORLD May 27 10:05:58 raspberrypi kernel: brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code May 27 10:05:58 raspberrypi kernel: cfg80211: World regulatory domain updated: May 27 10:05:58 raspberrypi kernel: cfg80211: DFS Master region: unset May 27 10:05:58 raspberrypi kernel: cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time) May 27 10:05:58 raspberrypi kernel: cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A) May 27 10:05:58 raspberrypi kernel: cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A) May 27 10:05:58 raspberrypi kernel: cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (N/A, 2000 mBm), (N/A) May 27 10:05:58 raspberrypi kernel: cfg80211: (5170000 KHz - 5250000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (N/A) May 27 10:05:58 raspberrypi kernel: cfg80211: (5250000 KHz - 5330000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (0 s) May 27 10:05:58 raspberrypi kernel: cfg80211: (5490000 KHz - 5730000 KHz @ 160000 KHz), (N/A, 2000 mBm), (0 s) May 27 10:05:58 raspberrypi kernel: cfg80211: (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 2000 mBm), (N/A) May 27 10:05:58 raspberrypi kernel: cfg80211: (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 0 mBm), (N/A) May 27 10:07:06 raspberrypi start.sh[1098]: 10:07:06.883 [ MQTT Ping: @7309] ERROR o.e.p.c.m.i.ClientState - @7309: Timed out as no activity, keepAlive=60,000 lastOutboundActivity=1,464,357,966,877 lastInboundActivity=1,464,357,907,045 time=1,464,358,026,876 lastPing=1,464,357,966,877 May 27 10:07:06 raspberrypi start.sh[1098]: 10:07:06.943 [ MQTT Ping: @7309] INFO c.l.h.s.h.a.ApsService - APS connection lost May 27 10:07:06 raspberrypi start.sh[1098]: 10:07:06.944 [ aps-reconnect] INFO c.l.h.s.h.a.ApsService - Attempting to reconnect APS May 27 10:07:07 raspberrypi start.sh[1098]: 10:07:07.082 [ aps-reconnect] INFO c.l.h.s.h.a.ApsService - Failed to reconnect APS; retrying in 10000 ms May 27 10:07:07 raspberrypi start.sh[1098]: com.lni.aps.ApsException: Error connecting to MQTT broker May 27 10:07:07 raspberrypi start.sh[1098]: at com.lni.aps.ahd.AhdMqttClient.connect(AhdMqttClient.java:152) ~[aps-1.0.6.jar!/:na] May 27 10:07:07 raspberrypi start.sh[1098]: at com.lni.hhh.service.hdata.aps.ApsService$ReconnectThread.run(ApsService.java :287) ~[h3l-2.1.0-beta9.jar!/:na] May 27 10:07:07 raspberrypi start.sh[1098]: Caused by: org.eclipse.paho.client.mqttv3.MqttException: MqttException The command line used to start wpa_supplicant is: /sbin/wpa_supplicant -u -s -O /run/wpa_supplicant wpa_supplicant config file: country=GB ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev update_config=1 Barry Reinhold (mailto:reinholds@xxxxxxxxxxx) _______________________________________________ Hostap mailing list Hostap@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/hostap
