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I am not able to use internet on Ubuntu 18.04 because network-manager is not running

When I try sudo /etc/init.d/network-manager start or restart, it gives following error

[....] Starting network-manager (via systemctl): network-manager.serviceJob for NetworkManager.service failed because the control process exited with error code. See "systemctl status NetworkManager.service" and "journalctl -xe" for details

After that the command systemctl status NetworkManager.service prints several lines and prints "Failed to start Network Manager." several times.

What can be done?

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  • What dies Journalcta say?
    – x3l51
    Commented Dec 26, 2019 at 14:31

1 Answer 1

Reset to default
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Got it. I had made changes to the /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf because my wifi was getting shut down within some time.

I don't remember what was the default value but I'd removed everything in it and replaced it by (only) 2. So network manger was complaining that it is not a correct key value pair and hence was not starting.

I replaced it to

[connection] wifi.powersave = 3

and now it is working.

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