Hi, I have 2 iMX6 devices running uBlox Lily WiFi, mrvl firmware sd8801_uapsta.bin in kernel 4.19.75. In my office, a WiFi router is just 1 meter away, the WiFi signal should not be a problem. One device could connect to the WiFi router well and stably, one could not, here were error messages: [ 408.990029] ieee80211 phy0: mwifiex_cfg80211_sched_scan_start : Invalid Sched_scan parameters ..................... [56.986414] ieee80211 phy0: mwifiex_cfg80211_sched_scan_start : Invalid Sched_scan parameter connmand[13469]: ../connman-1.35/src/service.c:preferred_tech_add_by_type() type 5 service 0x119120 Telstra connmand[13469]: ../connman-1.35/src/service.c:auto_connect_service() preferred 1 sessions 0 reason auto connmand[13469]: ../connman-1.35/src/ntp.c:send_timeout() send timeout 2 (retries 0) connmand[13469]: ../connman-1.35/plugins/ofono.c:netreg_update_strength() /ubloxqmi_2 Strength 80 connmand[13469]: ../connman-1.35/src/ntp.c:send_timeout() send timeout 4 (retries 1) connmand[13469]: ../connman-1.35/plugins/wifi.c:throw_wifi_scan() device 0x118da8 0x116c78 connmand[13469]: ../connman-1.35/src/device.c:connman_device_ref_debug() 0x118da8 ref 4 by ../connman-1.35/plugins/wifi.c:1214:throw_wifi_scan() connmand[13469]: ../connman-1.35/src/device.c:connman_device_set_scanning() device 0x118da8 scanning 1 connmand[13469]: ../connman-1.35/src/technology.c:__connman_technology_scan_started() device 0x118da8 connmand[13469]: ../connman-1.35/plugins/wifi.c:autoscan_timeout() interval 27 connmand[13469]: ../connman-1.35/plugins/wifi.c:interface_state() wifi 0x11a7c8 interface state 4 connmand[13469]: ../connman-1.35/plugins/wifi.c:scan_started() connmand[13469]: ../connman-1.35/src/rtnl.c:rtnl_message() NEWLINK len 56 type 16 flags 0x0000 seq 0 pid 0 connmand[13469]: ../connman-1.35/plugins/wifi.c:scan_finished() connmand[13469]: ../connman-1.35/plugins/wifi.c:interface_state() wifi 0x11a7c8 interface state 3 Both devices were installed the same firmware and software, if it was firmware / software issues, both would not be able to connect to WiFi, as one device could connect to the office WiFi router well, it could not the WiFi router problem either. If I move the faulty one to my home, it could connect to my home WiFi, so the device does not have WiFi problem, that is really confusing, what could cause that kind problem and how to debug and fix it? Thank you. Kind regards, - jh
