Wireless networking not working after resume in Ubuntu 14.04
Solution 1:
The above answers did not work for me on 14.10. After a bit of trial-and-error, I ended up with this,
#!/bin/sh
case "${1}" in
resume|thaw)
nmcli r wifi off && nmcli r wifi on ;;
esac
Put this in /etc/pm/sleep.d/10_resume_wifi
Make it executable sudo chmod 755 /etc/pm/sleep.d/10_resume_wifi
and the problem should be fixed immediately.
Solution 2:
I got a solution but it is just for restarting your network manager.
sudo service network-manager restart
It is not the permanent solution.