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After I sleep down my notebook (Xubuntu 12.04) and wake up, my network setting goes often corrupted and does not work. Only solution seems to be restart.

Connecting and disconnecting in network manager or sudo ifconfig eth0 down and later up does not help.

Sometimes the RJ45 connector is blinking, sometimes not even that. Occasionally other network cards (Wifi) gets jammed similarly, but I do not use them so often and I do not know if this is the same problem.

I'm running a virtualbox Windows 7 bridged to both network interfaces, do not know if there is some glue to that problem.

Is there a way how to completely init the network module in case this happen?

Edit: Using the responses bellow I have discovered, that nothing from sudo service networking restart or /etc/init.d/networking restart helped to bring the network card alive, once it gets "dead". Sometimes, the card is not even blinking like it would be disabled. Sometimes card is blinking, but no response, no IP address is assigned. Only solution is to switch notebook off and on again. Could it be a hardware problem? I have little comparison with dual-booted Windows, but it happens so rarely, that I had no opportunity to observe it on different OS.

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Recommended method:

The best way to restart networking is to do this:

though this is not a permanent solution to your problem.

Alternate(deprecated) method:

This one, though deprecated, is to do a /etc/init.d/networking restart. This is relatively verbose and explains what is going wrong(if there is anything going wrong).

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    will try when it happen again and let you know if this works. Permanent solution is not absolutely necessary, linux is for geeks.
    – Dee
    Jun 27, 2013 at 13:38
  • tried and no result with both methods. :c( Edited a question accordingly.
    – Dee
    Aug 21, 2013 at 13:07

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