wlan0 Is Missing, Unable To Connect WiFi (Experts Required)

[HFong]

Hi all,

I have a question to ask about.

Originally, my Intel Edison is able to connect WiFi.

I wish to disconnect WiFi once for some figuration, so I killed PID for wpa_supplicant once and re-enabled by "configure_edison --disableOneTimeSetup" according to answer in . It works for once.

However, the wlan0 is missing after I reboot Intel Edison and I no longer able to enable wlan0 by "configure_edison --disableOneTimeSetup".

Besides that, Intel Edison is unable to connect to WiFi via "configure_edison --wifi" command. None of my WiFi is found inside the Intel Edison.

It show error as shown in picture below:

I have tried by solving myself on this problem

First, I have checked my bcm4334x is installed in my Intel Edison.

I saw a similar situation/error as mine in the thread (Question raised by intel_jassowski), however install bcm4334x solution by "opkg install kernel-module-bcm4334x" does not work for me. My bcm4334x is installed and up to date.

Hope someone can help on this.

Thank you. 

---------------------------------------------------------Log For My Intel Edison------------------------------------------------------------------------------------

root@edison:~# opkg install kernel-module-bcm4334x

Package kernel-module-bcm4334x (1.141-r47) installed in root is up to date.

root@edison:~# ifup wlan0

ifup: can't open '/etc/network/interfaces': No such file or directory

root@edison:~# rfkill list all

0: bcm43xx Bluetooth: bluetooth

Soft blocked: yes

Hard blocked: no

root@edison:~# ifconfig

lo Link encap:Local Loopback

inet addr:127.0.0.1 Mask:255.0.0.0

inet6 addr: ::1/128 Scope:Host

UP LOOPBACK RUNNING MTU:65536 Metric:1

RX packets:0 errors:0 dropped:0 overruns:0 frame:0

TX packets:0 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:0

RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

usb0 Link encap:Ethernet HWaddr de:51:00:6b:d9:ef

inet addr:192.168.2.15 Bcast:192.168.2.255 Mask:255.255.255.0

inet6 addr: fe80::dc51:ff:fe6b:d9ef/64 Scope:Link

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

RX packets:159 errors:0 dropped:0 overruns:0 frame:0

TX packets:37 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:23870 (23.3 KiB) TX bytes:8218 (8.0 KiB)

root@edison:~# journalctl -xn

-- Logs begin at Sat 2000-01-01 00:00:23 UTC, end at Fri 2015-06-19 05:46:43 UT

C. --

Jun 19 05:45:28 edison login[241]: [[1;39mROOT LOGIN on '/dev/ttyMFD2'[[0m

Jun 19 05:45:40 edison dbus[212]: [[1;39m[system] Failed to activate service 'o

rg.freedesktop.hostname1': timed out[[0m

Jun 19 05:45:40 edison dbus-daemon[212]: dbus[212]: [system] Failed to activate

service 'org.freedesktop.hostname1': timed out

Jun 19 05:46:43 edison systemd[1]: [[1;39mJob sys-subsystem-net-devices-wlan0.d

evice/start timed out.[[0m

Jun 19 05:46:43 edison systemd[1]: [[1;31mTimed out waiting for device sys-subs

ystem-net-devices-wlan0.device.[[0m

Jun 19 05:46:43 edison systemd[1]: [[1;31mDependency failed for WPA supplicant

service.[[0m

Jun 19 05:46:43 edison systemd[1]: Starting Multi-User System.

Jun 19 05:46:43 edison systemd[1]: Reached target Multi-User System.

root@edison:~# systemctl -l status systemd-modules-load.service

â—&# 143; systemd-modules-load.service - Load Kernel Modules

Loaded: loaded (/lib/systemd/system/systemd-modules-load.service; static)

Active: failed (Result: exit-code) since Fri 2015-06-19 05:38:34 UTC; 4min 44

s ago

Docs: man:systemd-modules-load.service(8)

man:modules-load.d(5)

Process: 191 ExecStart=/lib/systemd/systemd-modules-load (code=exited, status=

1/FAILURE)

Main PID: 191 (code=ex...

[CFERR17]

Hi,

Check hostapd

systemctl status hostapd and eventually stop or disable

systemctl stop wpa_supplicant

systemctl start wpa_supplicant

wpa_cli status or ifconfig to check if wlan0 is up.

Hope this helps,

[HFong]

Thanks for the suggestion. 

However, it does not works for my Intel Edison 

Below are the details:

root@edison:~# systemctl status hostapd

â—&# 143; hostapd.service - Hostap daemon service

Loaded: loaded (/lib/systemd/system/hostapd.service; disabled)

Active: inactive (dead)

Jun 19 05:39:24 edison systemd[1]: Stopped Hostap daemon service.

Jun 19 05:55:58 edison systemd[1]: Stopped Hostap daemon service.

Jun 19 06:04:32 edison systemd[1]: Stopped Hostap daemon service.

Jun 19 06:06:27 edison systemd[1]: Stopped Hostap daemon service.

Jun 19 06:11:20 edison systemd[1]: Stopped Hostap daemon service.

root@edison:~# systemctl stop wpa_supplicant

root@edison:~# systemctl start wpa_supplicant

A dependency job for wpa_supplicant.service failed. See 'journalctl -xn' for det

ails.

root@edison:~# ifconfig

lo Link encap:Local Loopback

inet addr:127.0.0.1 Mask:255.0.0.0

inet6 addr: ::1/128 Scope:Host

UP LOOPBACK RUNNING MTU:65536 Metric:1

RX packets:0 errors:0 dropped:0 overruns:0 frame:0

TX packets:0 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:0

RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

usb0 Link encap:Ethernet HWaddr 26:e8:8f:ca:e1:77

inet addr:192.168.2.15 Bcast:192.168.2.255 Mask:255.255.255.0

inet6 addr: fe80::24e8:8fff:feca:e177/64 Scope:Link

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

RX packets:640 errors:0 dropped:0 overruns:0 frame:0

TX packets:43 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:108245 (105.7 KiB) TX bytes:9070 (8.8 KiB)

[CFERR17]

Hello,

what about /etc/wpa_supplicant/wpa_supplicant.conf

May be a misconfiguration ?

Try to clean and restart wpa_supplicant service?

[HFong]

Thanks for the fast reply. 

Below are the details for /etc/wpa_supplicant/wpa_supplicant.conf:

ctrl_interface=/var/run/wpa_supplicant

ctrl_interface_group=0

config_methods=virtual_push_button virtual_display push_button keypad

update_config=1

fast_reauth=1

device_name=Edison

manufacturer=Intel

model_name=Edison

network={

ssid="******************"

scan_ssid=1

key_mgmt=WPA-PSK

pairwise=CCMP TKIP

group=CCMP TKIP WEP104 WEP40

eap=TTLS PEAP TLS

psk="************"

}

Below are the details for restarting and start the wpa_supplicant service:

root@edison:/etc/opkg# systemctl restart wpa_supplicant

A dependency job for wpa_supplicant.service failed. See 'journalctl -xn' for det

ails.

root@edison:~# wpa_supplicant -B -Dnl80211 -iwlan0 -c/etc/wpa_supplicant/wpa_supplicant.conf

Successfully initialized wpa_supplicant

nl80211: Driver does not support authentication/association or connect commands

Could not read interface wlan0 flags: No such device

wlan0: Failed to initialize driver interface

[CFERR17]

Could you check this post :

or have you already read it?

[HFong]

Thanks for the fast reply. 

Tried for the solution in , but it does not works

Below are the details: 

root@edison:~# rfkill list

0: bcm43xx Bluetooth: bluetooth

Soft blocked: yes

Hard blocked: no

root@edison:~# ifconfig

lo Link encap:Local Loopback

inet addr:127.0.0.1 Mask:255.0.0.0

inet6 addr: ::1/128 Scope:Host

UP LOOPBACK RUNNING MTU:65536 Metric:1

RX packets:0 errors:0 dropped:0 overruns:0 frame:0

root@edison:~# wpa_supplicant -B -Dnl80211 -iwlan0 -c/etc/wpa_supplicant/wpa_sup

plicant.conf

Successfully initialized wpa_supplicant

nl80211: Driver does not support authentication/association or connect commands

Could not read interface wlan0 flags: No such device

wlan0: Failed to initialize driver interface

root@edison:~# busybox udhcpc -i wlan0

udhcpc: SIOCGIFINDEX: No such device

root@edison:~# vi /etc/system/sytem/basic.target.wants/network-gadget-init.service

Nothings inside

root@edison:~# systemctl disable network-gadget-init.service

root@edison:~# vi /etc/wpa_supplicant/wpa_supplicant.conf

ctrl_interface=/var/run/wpa_supplicant

ctrl_interface_group=0

config_methods=virtual_push_button virtual_display push_button keypad

update_config=1

fast_reauth=1

device_name=Edison

manufacturer=Intel

model_name=Edison

network={

ssid="******************"

scan_ssid=1

key_mgmt=WPA-PSK

pairwise=CCMP TKIP

group=CCMP TKIP WEP104 WEP40

eap=TTLS PEAP TLS

psk="************"

}

root@edison:~# wpa_cli enable_network 1

Failed to connect to non-global ctrl_ifname: (null) error: No such file or dire

ctory

root@edison:~# wpa_cli select_network 1

Failed to connect to non-global ctrl_ifname: (null) error: No such file or dire

ctory

root@edison:~# wpa_cli save

Failed to connect to non-global ctrl_ifname: (null) error: No such file or dire

ctory

root@edison:~# wpa_cli quit

Failed to connect to non-global ctrl_ifname: (null) error: No such file or dire

ctory

root@edison:~# rfkill unblock wlan

root@edison:~# systemctl enable wpa_supplicant

[HFong]

Bump

[idata]

Seems like the device wlan0 went away for some reason...

Check the following:

1. Check for running service: systemctl status systemd-networkd.service
2. Check for running target: systemctl status network.target
3. Check for wlan0 device: systemctl status sys-subsystem-net-devices-wlan0.device (This should show the device file if it exists... mine was: "/sys/devices/pci0000:00/0000:00:01.3/mmc_host/mmc2/mmc2:0001/mmc2:0001:2/net/wlan0" )
4. systemctl status systemd-udevd.service (This should be running & handles kernel device events)
5. Check lspci -k for SD Host controller: Intel Corporation Device 1190 (rev 01)
6. Check that you don't somehow have bcm4334x module blacklisted in /etc/modprobe.d/*
7. Check that file /etc/modules-load.d/bcm4334x.conf contains single line with "bcm4334x"
8. Check that file /etc/modprobe.d/bcm4334x.conf contains "options bcm4334x firmware_path=/etc/firmware/fw_bcmdhd.bin nvram_path=/etc/firmware/bcmdhd.cal op_mode=4"
9. Check output of lsmod for "bcm4334x" (e.g.: lsmod | grep -i bcm4334x )
10. Check output of modprobe -c for "bcm43" (e.g.: modprobe -c | grep bcm43 )

If the kernel module is not loaded, load it with: modprobe bcm4334x

If systemd-udevd.service is not running, start it with: systemctl enable systemd-udevd.service; systemctl start systemd-udevd.service

If any of the other services is not running, start & enable with: systemctl enable __service_name_here.service; systemctl start __service_name_here.service

If it's still not working, have you tried rebooting after ensuring all system services are enabled?

[HFong]

Thanks for the reply.

Step 3 shows that the wlan0 is inactive (dead)

But, I unable to start it by typing systemctl enable sys-subsystem-net-devices-wlan0.device

It show "Failed to execute operation: No such file or directory"

How to perform Step 6?

Because I type vi /etc/modprobe.d/*

It will directly open /etc/modprobe.d/bcm4334x.conf 

Besides that, I am unable to perform modprobe bcm4334x 

It show "modprobe: ERROR: could not insert 'bcm4334x': No such device"

Below are the details:

root@edison:~# systemctl status systemd-networkd.service -l

â—&# 143; systemd-networkd.service - Network Service

Loaded: loaded (/lib/systemd/system/systemd-networkd.service; enabled)

Active: active (running) since Fri 2015-06-19 06:15:32 UTC; 4min 12s ago

Docs: man:systemd-networkd.service(8)

Main PID: 224 (systemd-network)

Status: "Processing requests..."

CGroup: /system.slice/systemd-networkd.service

â""â"€224 /lib/systemd/systemd-networkd

Jun 19 06:15:35 edison systemd-networkd[224]: usb0: gained carrier

Jun 19 06:15:35 edison systemd-networkd[224]: usb0: link configured

root@edison:~# systemctl status network.target -l

â—&# 143; network.target - Network

Loaded: loaded (/lib/systemd/system/network.target; static)

Active: active since Fri 2015-06-19 06:15:32 UTC; 4min 38s ago

Docs: man:systemd.special(7)

http://www.freedesktop.org/wiki/Software/systemd/NetworkTarget http://www.freedesktop.org/wiki/Software/systemd/NetworkTarget

root@edison:~# systemctl status sys-subsystem-net-devices-wlan0.device -l

â—&# 143; sys-subsystem-net-devices-wlan0.device

Loaded: loaded

Active: inactive (dead)

Jun 19 06:15:29 edison systemd[1]: Expecting device sys-subsystem-net-devices-wl

an0.device...

Jun 19 06:16:59 edison systemd[1]: Job sys-subsystem-net-devices-wlan0.device/st

art timed out.

Jun 19 06:16:59 edison systemd[1]: Timed out waiting for device sys-subsystem-ne

t-devices-wlan0.device.

root@edison:~# systemctl status systemd-udevd.service

â—&# 143; systemd-udevd.service - udev Kernel Device Manager

Loaded: loaded (/lib/systemd/system/systemd-udevd.service; static)

Active: active (running) since Sat 2000-01-01 00:00:25 UTC; 15 years 5 months

ago

Docs: man:systemd-udevd.service(8)

man:udev(7)

Main PID: 122 (systemd-udevd)

CGroup: /system.slice/systemd-udevd.service

â""â"€122 /lib/systemd/systemd-udevd

Jan 01 00:00:25 edison systemd[1]: Started udev Kernel Device Manager.

root@edison:~# lspci -k

00:00.0 Host bridge: Intel Corporation Device 1170 (rev 01)

00:01.0 SD Host controller: Intel Corporation Device 1190 (rev 01)

Kernel driver in use: sdhci-pci

00:01.2 SD Host controller: Intel Corporation Device 1190 (rev 01)

Kernel driver in use: sdhci-pci

00:01.3 SD Host controller: Intel Corporation Device 1190 (rev 01)

Kernel driver in use: sdhci-pci

00:02.0 Display controller: Intel Corporation Device 1182 (rev 01)

00:04.0 Serial controller: Intel Corporation Device 1191 (rev 01)

Kernel driver in use: HSU serial

00:04.1 Serial controller: Intel Corporation Device 1191 (rev 01)

Kernel driver in use: HSU serial

00:04.2 Serial controller: Intel Corporation Device 1191 (rev 01)

Kernel driver in use: HSU serial

00:04.3 Serial controller: Intel Corporation Device 1191 (rev 01)

Kernel driver in use: HSU serial

00:05.0 Serial controller: Intel Corporation Device 1192 (rev 01)

Kernel driver in use: HSU DMA

00:06.0 System peripheral: Intel Corporation Device 1193 (rev 01)

00:06.1 System peripheral: Intel Corporation Device 1193 (rev 01)

00:07.0 System peripheral: Intel Corporation Device 1194 (rev 01)

Kernel driver in use: intel_mid_ssp_spi_unified

00:07.1 System peripheral: Intel Corporation Device 1194 (rev 01)

Kernel driver in use: intel_mid_ssp_spi_unified

00:07.2 System peripheral: Intel Corporation Device 1194 (rev 01)

Kernel driver in use: intel_mid_ssp_spi_unified

00:08.0 Communication controller: Intel Corporation Device 1195 (rev 01)

Kernel driver in use: i2c-designware-pci

00:08.1 Communication controller: Intel Corporation Device 1195 (rev 01)

Kernel driver in use: i2c-designware-pci

00:08.2 Communication controller: Intel Corporation Device 1195 (rev 01)

Kernel driver in use: i2c-designware-pci

00:08.3 Communication controller: Intel Corporation Device 1195 (rev 01)

Kernel driver in use: i2c-designware-pci

00:09.0 Communication controller: Intel Corporation Device 1196 (rev 01)

Kernel driver in use: i2c-designware-pci

00:09.1 Communication controller: Intel Corporation Device 1196 (rev 01)

Kernel driver in use: i2c-designware-pci

00:09.2 Communication controller: Intel Corporation Device 1196 (rev 01)

Kernel driver in use: i2c-designware-pci

00:0a.0 Communication controller: Intel Corporation Device 1197 (rev 01)

00:0b.0 Encryption controller: Intel Corporation Device 1198 (rev 01)

00:0c.0 System peripheral: Intel Corporation Device 1199 (rev 01)

Kernel driver in use: langwell_gpio

00:0d.0 Multimedia audio controller: Intel Corporation Device 119a (rev 01)

00:0e.0 System peripheral: Intel Corporation Device 119b (rev 01)

Kernel driver in use: intel_mid_dma

00:11.0 USB controller: Intel Corporation Device 119e (rev 01)

Kernel driver in use: dwc3_otg

00:12.0 Signal processing controller: Intel Corporation Device 119f (rev 01)

Kernel driver in use: pciPTI

00:13.0 Co-processor: Intel Corporation Device 11a0 (rev 01)

Kernel driver in use: intel_scu_ipc

00:14.0 Co-processor: Intel Corporation Device 11a1 (rev 01)

Kernel driver in use: intel_pmu_driver

00:15.0 System peripheral: Intel Corporation D...

[Sergio_A_Intel]

Have you considered re-flashing your board to see if it fixes the issue? Take a look at https://software.intel.com/en-us/articles/flash-tool-lite-user-manual IoT - Flash Tool Lite User Manual | Intel® Developer Zone , flash the latest image and try again. This time, with a newly flashed image, follow the steps from the guide and see if you can see wlan0 again.

Let us know your results.

Sergio

[HFong]

I fixed this issue by reflashing the board.

Thanks!