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Wifi disconnected after wake up
For doing that, you can check the value of the power save mode:
cat /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf
And change the value to 2 by doing:
sudo sed -i 's/wifi.powersave = 3/wifi.powersave = 2/' /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf