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After normal system start no network is detected. If I plug off ethernet cable and insert usb wi-fi, no new device is detected either.

However if I run system in recovery mode and enable networking in recovery menu, the internet works fine. The problem is I must do it every single time I start my computer.

ifconfig
sudo lshw -C network

prints this: http://pastebin.com/wcJztG9R

In 2nd case I can see "*-network DISABLED". Tried to enable it in network menu, but nothing is detected.

Seems strange to me. I do not remember changing any config files or network settings. I just restarted my PC and network stopped working.

I use Ubuntu 14.0.4 LTS

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2 Answers 2

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[Note: if you don't have your WiFi adapter plugged in, omit the commands containing wlan0]

After boot, try running these commands:

sudo su
service network-manager stop
ifconfig wlan0 down
ifconfig eth0 down
ifconfig wlan0 up
ifconfig eth0 up
service network-manager start
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  • This did not work. After recovery it even disabled working network and did not re-enabled it.
    – robson021
    May 15, 2016 at 13:56
  • @user138974 - Alright. After boot try running sudo service network-manager restart May 15, 2016 at 13:59
  • Tried it and got info about process running, but still no network connection. Do you think distro-upgrade may help and bring proper configuration?
    – robson021
    May 15, 2016 at 14:59
  • @user138974 - I'd see if Software Updater has any updates for you first. May 15, 2016 at 15:41
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After a while system repaired itself. What goes around comes around.

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