hello, i meet the same questions about "Error /net/connman/technology/wifi: No carrier" ,anyone can help?

[andrew-bibb]

First off we need to see if ConnMan can find the wifi service. From a terminal window type the following: connmanctl technologies

Check to see that WiFi is listed. If it says "Powered = False" then type:

wifi enable

It should come back with a message saying "Enabled wifi". If it does that then type:

scan wifi

To exit connmanctl type quit

If it fails at the "wifi enable" command you may need to use rfkill. As root or super user: rfkill unblock all. I have had several fresh installs where rfkill has to be used first (and only once) to enable wifi.

If the above does not work then there is a problem at the Connman end, not the CMST end. One additional thing to check is wpa_supplicant. From a terminal window type:

systemctl status wpa_supplicant and see what you get for results.

Feel free to post any output from the above commands you think may be helpful.

[ShiyuanSolutions]

hello ,i follow your steps and type the command "systemctl status wpa_supplicant", and then get followos as:

soluxz@zktecon:~/workplace/connmanProject/d-feet-0.1.7$ systemctl status wpa_supplicant ● wpa_supplicant.service - WPA supplicant Loaded: loaded (/lib/systemd/system/wpa_supplicant.service; disabled; vendor preset: enabled) Active: active (running) since 四 2017-07-20 18:17:58 CST; 14h ago Main PID: 18227 (wpa_supplicant) CGroup: /system.slice/wpa_supplicant.service └─18227 /sbin/wpa_supplicant -u -s -O /run/wpa_supplicant

7月 20 22:18:23 zktecon wpa_supplicant[18227]: nl80211: deinit ifname=wlx7cdd90caf78b disabled_11b_rates=0 7月 20 22:19:04 zktecon wpa_supplicant[18227]: dbus: wpa_dbus_get_object_properties: failed to get object properties: (none) none 7月 20 22:19:04 zktecon wpa_supplicant[18227]: dbus: Failed to construct signal 7月 20 22:20:40 zktecon wpa_supplicant[18227]: nl80211: deinit ifname=wlx7cdd90caf78b disabled_11b_rates=0 7月 21 08:49:55 zktecon wpa_supplicant[18227]: dbus: wpa_dbus_get_object_properties: failed to get object properties: (none) none 7月 21 08:49:55 zktecon wpa_supplicant[18227]: dbus: Failed to construct signal 7月 21 09:11:24 zktecon wpa_supplicant[18227]: rfkill: WLAN soft blocked 7月 21 09:11:25 zktecon wpa_supplicant[18227]: nl80211: deinit ifname=wlx7cdd90caf78b disabled_11b_rates=0 7月 21 09:12:31 zktecon wpa_supplicant[18227]: dbus: wpa_dbus_get_object_properties: failed to get object properties: (none) none 7月 21 09:12:31 zktecon wpa_supplicant[18227]: dbus: Failed to construct signal

what 's problems?

[andrew-bibb]

It looks like right here:

21 09:11:24 zktecon wpa_supplicant[18227]: rfkill: WLAN soft blocked

As root or super user unblock it from a terminal: rfkill unblock all

I'm not that familiar with the workings of wpa_s so you may need to restart the service after removing the soft block.