Comment 92 for bug 1286552

Works for me too.

sudo touch /etc/pm/sleep.d/wakenet.sh

sudo chmod +x /etc/pm/sleep.d/wakenet.sh

sudo gedit /etc/pm/sleep.d/wakenet.sh

Insert the following lines:

#!/bin/bash
case "$1" in
thaw|resume)
nmcli nm sleep false
pkill -f wpa_supplicant
;;
*)
;;
esac
exit $?

And then save.

At least the problem seems to be solved !!