Hi there, I have the following issue: I am connecting to the corporate network which has APs of both 2.4GHz and 5GHz with the same SSID, `purpleline`. When I am connecting to an AP is working fine for a while, but after some time I am disconnected. I can reconnect again automatically after a long period of time, like half a day. If I restart the network manager, `connman`, or `wpa_supplicant` connects immediately with no issues. The hardware used is a Compulab IOT gateway IOT-GATE-iMX7 (WAB), `https://www.compulab.com/products/iot-gateways/iot-gate-imx7-nxp-i-mx-7-internet-of-things-gateway/#specs`, which uses the TI WiLink 8 WL1837 module for the wifi connection. A custom made Linux system is used, build with Yocto, which has the following characteristics: * Linux kernel version: 4.19.35 * Kernel module for WiFi: wl18xx ``` # modinfo wl18xx filename: /lib/modules/4.19.35+ge4452f4458e4/kernel/drivers/net/wireless/ti/wl18xx/wl18xx.ko firmware: ti-connectivity/wl18xx-fw-4.bin author: Luciano Coelho <coelho@xxxxxx> license: GPL v2 srcversion: 533BB7E5866E52F63B9ACCB alias: platform:wl18xx depends: intree: Y name: wl18xx vermagic: 4.19.35+ge4452f4458e4 SMP preempt mod_unload modversions ARMv6 p2v8 parm: ht_mode:Force HT mode: wide or siso20 (charp) parm: board_type:Board type: fpga, hdk (default), evb, com8 or dvp (charp) parm: checksum:Enable TCP checksum: boolean (defaults to false) (bool) parm: dc2dc:External DC2DC: u8 (defaults to 0) (int) parm: n_antennas_2:Number of installed 2.4GHz antennas: 1 (default) or 2 (int) parm: n_antennas_5:Number of installed 5GHz antennas: 1 (default) or 2 (int) parm: low_band_component:Low band component: u8 (default is 0x01) (int) parm: low_band_component_type:Low band component type: u8 (default is 0x05 or 0x06 depending on the board_type) (int) parm: high_band_component:High band component: u8, (default is 0x01) (int) parm: high_band_component_type:High band component type: u8 (default is 0x09) (int) parm: pwr_limit_reference_11_abg:Power limit reference: u8 (default is 0xc8) (int) parm: num_rx_desc:int parm: num_rx_desc_param:Number of Rx descriptors: u8 (default is 32) ``` * WiFi firmware version: ``` # strings /lib/firmware/ti-connectivity/wl18xx-fw-4.bin | grep Rev FRev 8.9.0.0.79 FRev 8.2.0.0.242 ``` * Supplicant: wpa_supplicant v2.9 ``` # cat /etc/wpa_supplicant.conf ctrl_interface=/var/run/wpa_supplicant ctrl_interface_group=0 update_config=1 network={ key_mgmt=NONE } ``` * Network manager: Connman v1.37 ``` # cat /etc/connman/main.conf [General] SingleConnectedTechnology=false FallbackTimeservers= NetworkInterfaceBlacklist=vmnet,vboxnet,virbr,ifb,ve-,vb-,wlanap AllowHostnameUpdates=false DefaultAutoConnectTechnologies=cellular,wifi,ethernet AlwaysConnectedTechnologies=cellular,wifi PreferredTechnologies=cellular,wifi,ethernet ``` I enabled the debugging options of both the WiFi driver and `wpa_supplicant` like following * `echo 883518 > /sys/module/wlcore/parameters/debug_level` * `/usr/sbin/wpa_supplicant -u -d` The gateway is connected to the AP with SSID `purpleline` and BSSID `58:0a:20:5b:ec:ca`. The configuration file in `connman` looks like the following: ``` # cat /var/lib/connman/wifi_304511e7f479_707572706c656c696e65_managed_psk/settings [wifi_304511e7f479_707572706c656c696e65_managed_psk] Name=purpleline SSID=707572706c656c696e65 Frequency=5560 Favorite=true AutoConnect=true Modified=2019-11-25T11:19:49.091126Z Passphrase=<PASSWORD> IPv4.method=dhcp IPv4.DHCP.LastAddress=10.163.183.9 IPv6.method=auto IPv6.privacy=disabled ``` The logs when the AP is disconnected are in the attached file `disconnect_AP-wl18xx-wpa_supplicant.log`. It is worth noting that after it is disconnected, it is probing a scan for `purpleline` ``` Nov 26 04:35:50 bumblebee-259793 wpa_supplicant[546]: nl80211: Scan probed for SSID 'purpleline' ``` Although there are SSIDs `purpleline`, it does not connect to any of them ``` Nov 26 04:35:50 bumblebee-259793 wpa_supplicant[546]: wlansta0: BSS: Add new id 4780 BSSID 6c:fa:89:55:ce:7a SSID 'purpleline' freq 5700 Nov 26 04:35:50 bumblebee-259793 wpa_supplicant[546]: wlansta0: BSS: Add new id 4785 BSSID 58:0a:20:5b:ec:c5 SSID 'purpleline' freq 2412 Nov 26 04:35:50 bumblebee-259793 wpa_supplicant[546]: wlansta0: BSS: Add new id 4791 BSSID 20:3a:07:6f:e9:5a SSID 'purpleline' freq 5680 Nov 26 04:35:50 bumblebee-259793 wpa_supplicant[546]: wlansta0: BSS: Add new id 4792 BSSID 1c:1d:86:e8:ce:b5 SSID 'purpleline' freq 2412 Nov 26 04:35:50 bumblebee-259793 wpa_supplicant[546]: wlansta0: BSS: Add new id 4801 BSSID 20:3a:07:6f:51:fa SSID 'purpleline' freq 5660 Nov 26 04:35:50 bumblebee-259793 wpa_supplicant[546]: wlansta0: BSS: Add new id 4809 BSSID 34:a8:4e:e7:4d:da SSID 'purpleline' freq 5500 ``` I was keep getting scan messages after was disconnected from the AP which are in the log file `scans_while_disconnected_AP-wl18xx-wpa_supplicant.log`. The connection is happening after a long time, almost half day after the initial connection. The logs are in this attached file `connect_AP-wl18xx-wpa_supplicant.log`. It is worth noting that it is connected to an AP with SSID `purpleline`, BSSID `58:0a:20:5b:ec:ca` and frequency 5560 as it was when it was connected initially. I would like to ask the following: 1. The above behavior is a little bit strange because it is very slow to connect automatically, but when I restart `connman` or `wpa_supplicant` it connects immediately. What might be the cause of this? 2. Is there a configuration in `wpa_supplicant` that I missed, although `connman` is 'driving' `wpa_supplicant`? 3. Does the WiFi driver might be responsible for this? Let me know if you need more information. Kind regards, Stavros
Attachment:
connect_AP-wl18xx-wpa_supplicant.log.gz
Description: connect_AP-wl18xx-wpa_supplicant.log.gz
Attachment:
scans_while_disconnected_AP-wl18xx-wpa_supplicant.log.gz
Description: scans_while_disconnected_AP-wl18xx-wpa_supplicant.log.gz
Attachment:
disconnect_AP-wl18xx-wpa_supplicant.log.gz
Description: disconnect_AP-wl18xx-wpa_supplicant.log.gz
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