About wlan0

GoogleGroups
1

Hi all
On beaglebone black, I’m using Ubuntu 14.04 prebuilt image.

I have a problem.

I tried to connect with wifi.
I edited /etc/network/interfaces.

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp

iface eth0 inet static

address 192.168.12.111

netmask 255.255.255.0

gateway 192.168.12.1

auto wlan0
iface wlan0 inet static
address 192.168.12.101
netmask 255.255.255.0
gateway 192.168.12.1
wpa-ssid “wifi1”
wpa-psk “password”

dns-nameservers 192.168.12.1

in the state that does not connect the eht0,
If eth0 is dhcp , wlan0 can connect.
If eth0 is staic , wlan0 not be able to connect.

What is solution?

Thank you.

2

Ubuntu I believe uses a different network manager. connman or some such program. I could not say which for sure as I have not used Ubuntu for a very long time. However, you should be able to use google.

try googling -----> Ubuntu 14.04 how to static ip

3

errrr . . . its before my morning “coffee”. But problem may still be google-able, and may very well still have to do with the network manager.

4

I have similar problems with Debian console image.For me if eth0 is down, wlan0 can’t initialize correctly. Try change auto wlan0 to allow-hotplug wlan0.

5

Thank you for your suggestion
Also, I’m sorry reply late.
So I am not native English, I takes time to write.

Ubuntu I believe uses a different network manager

I am aware network maneger is used in GUI environment, and, should not be used on the server without a GUI
Am I wrong?

Try change auto wlan0 to allow-hotplug wlan0.

I changed

auto wlan0

allow-hotplug wlan0

After that, I started wlan0
ifup wlan0

Message is displayed
RTNETLINK answers: File exists
Failed to bring up wlan0

wlan0 had started.
ifconfig
wlan0 Link encap: Ethernet HWaddr dc: fb: 02:59:1 d: 4e
inet addr: 192.168.12.101 Bcast: 192.168.12.255 Mask: 255.255.255.0
inet6 addr: fe80 :: defb: 2ff: fe59: 1d4e/64 Scope: Link
UP BROADCAST RUNNING MULTICAST MTU: 1500 Metric: 1
RX packets: 1115 errors: 0 dropped: 0 overruns: 0 frame: 0
TX packets: 33 errors: 0 dropped: 0 overruns: 0 carrier: 0
collisions: 0 txqueuelen: 1000
RX bytes: 163039 (163.0 KB) TX bytes: 6373 (6.3 KB)

However, like the previous, wifi unable to communicate. ping unreachable