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I run Ubuntu 13.10 (though on 13.04 situation was the same) on Thinkpad E125 laptop

I have very common problem - there were no WiFi after suspend. I've googled the problem and find solution that works perfectly - - after following those recommendation I have probably 100 suspend/wake-up cycles - WiFi always worked

But this fix didn't affect hibernate - now I have 100% times not working wifi after hibernate. If after hibernate I go to suspend and back - wifi start working again.

Can some please advise the way to apply that patch to hibernate

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Try sudo killall NetworkManager, as suggested in Network devices unmanaged after resume from hibernation in Ubuntu Gnome 13.10 . It works fine for me!

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This issue seems to be caused by bug #1184262 . It is not related to the networking as such, but to power management.

The workaround I found was to create a file with: sudo gedit /etc/pm/sleep.d/10_resume_network and paste the following:

#Tell Network Manager that resume was successful

case "$1" in
         nmcli nm sleep false

Then, save and close the file and enter sudo chmod +x /etc/pm/sleep.d/10_resume_network.

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