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I have got this issue with Ubuntu 10.10. I have been with Ubuntu 8.04 and then decided to try out Ubuntu 10.10 .

I booted with a LiveCD and was able to configure the wireless network painlessly using the livecd. So happily I installed Ubuntu 10.10. As soon as Ubuntu came up it detected the wireless network and I was able to assign a static IP to eth1 (i dont use DHCP option on my ADSL router) and enter a wap key and use pppoeconf to configure the dialer. The net was on and I was able to surf the net. All hunky dory so far. However on the next boot the fun started. It did not detect the wireless network. I could not see the network manager icon in the systray. I used ifconfig and saw that the entry for eth1 was missing. I used ifup eth1 and it said that eth1 was already up .

Then I installed wifi-radar. Wifi-Radar detected the wireless network. I configured wifi-radar for the detected wireless network , set the wap driver as wext and used the manual IP settings. However on clicking connect wifi-radar started looking for a DHCP IP , needless to say it failed. For the love of god I cannot understand why wifi-radar is using DHCP when I have specified manual settings .

Next I decided to use the wired network to surf the net looking for a solution . So I plugged in the network cable from my modem , it detected the plugged in connection , I configured eth0 , used pppoeconf and connected to the net. Then I foolishly decided to reboot my PC. And wonders of wonders , the same problem appeared. I cannot see eth0 in my ifconfig anymore. I used pon to start the dsl-provider connection and it said something about network error or something . Now my ifconfig shows only lo , both eth0 and eth1 have disappeared. Can anybody help me on this?

Is it a problem with ipv6 , if so how do you disable ipv6 on Ubuntu 10.10 ? OR is this is a known issue with Ubuntu 10.10?

P.S.

  1. I tried Linux mint 10 and had the same issue. On rebooting wireless network was not getting detected .
  2. I have made myself the administrator so that there is no issue of rights or anything.
N.N.
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user9054
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4 Answers4

2

I happens to me every time I configure pppoe after a fresh install. After the reboot the network connections becomes unmanageable. You need to do the following: open terminal and type:

sudo -H gedit /etc/NetworkManager/NetworkManager.conf

you will find your connection there and changed managed=false to managed=true and then restart you system. You will be able to get your network up and running again

Pilot6
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Syed Khalil
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1

In order for Network Manager to manage your wireless connection, your wireless interface must NOT be listed in /etc/network/interfaces. But pppoeconf adds it. So what you need to do is remove it.

Edit /etc/network/interfaces by opening a terminal and typing

sudo gedit /etc/network/interfaces

and delete the following lines:

auto wlan0
iface wlan0 inet manual

Restart, and you should be good to go.

kaapstorm
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0

Make sure you've read the Ubuntu documentation on Wireless troubleshooting, which is available at https://help.ubuntu.com/community/WifiDocs/WirelessTroubleShootingGuide/

I've recently had a relative with a similar issue on his laptop. It turned out that the wireless card was disabled, and Fn + F12 had to be pressed to turn it on (it may differ on your computer, e.g. a switch in front of the laptop). The command rfkill list should show "no" twice on Soft/ Hard blocked for "Wireless LAN".

Lekensteyn
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0

According to the questioner, using wicd solved the problem.

sudo apt-get install wicd
djeikyb
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