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WiFi on Ubuntu issue

post #1 of 3
Thread Starter 
Hi guys

I have a laptop running Ubuntu 12.04 (I think, can confirm later). It's been running great for a few months but yesterday the laptop was taken outside the range of my router, now it will not reconnect via WiFi. I've tried a few things from a quick google but have more questions than were answered.

I've tried the following to release the IP and get a new one from the router
Code:
ifconfig wlan0 down

but the output tells me that interface wlan0 is not configured. The GUI shows that the network is connected (and I can select disconnect) but there is no network connectivity in a browser.

I can connect to other WiFi networks without any problems and I've cleared any DHCP IP leases from my router. What can I do next to further troubleshoot this problem? I've reached the limit of my very little Linux experience tongue.gif

Thanks
TudjBox.
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TudjBox.
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post #2 of 3
ifconfig wlan0 down will only disable your WLAN connection, but as you're not connected, it will already be down.

Can you connect to your wireless network then punch in the following commands:
Code:
ping -c3 google.com
ping -c3 173.194.34.97
if the former fails but the latter succeeds then you are connected, but your DNS is broken. Have a read about how to fix your DNS (resolve.conf) in Ubuntu (I don't use Ubuntu myself so couldn't advice there).

if both fail, then you're not seeing the outside world at all. so can you paste the output from:
Code:
ifconfig wlan0
That will show a few details about your "active" connection.
post #3 of 3
Thread Starter 
Quote:
Originally Posted by Plan9 View Post

ifconfig wlan0 down will only disable your WLAN connection, but as you're not connected, it will already be down.

Can you connect to your wireless network then punch in the following commands:
Code:
ping -c3 google.com
ping -c3 173.194.34.97
if the former fails but the latter succeeds then you are connected, but your DNS is broken. Have a read about how to fix your DNS (resolve.conf) in Ubuntu (I don't use Ubuntu myself so couldn't advice there).

if both fail, then you're not seeing the outside world at all. so can you paste the output from:
Code:
ifconfig wlan0
That will show a few details about your "active" connection.

I'll try it when I get home, thanks.

I did a ifconfig wlan0 last night, the output shows it's connected (correct name for ESSID). I'll paste the complete output once I'm home.
TudjBox.
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TudjBox.
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