After having issues with network manager after my laptop shutdown I found a fix to the issue. To read the full blog post go here.

http://www.harshj.com/2010/06/02/network-manager-disabled/

Highlights:


# Remove wrongly persisting NM state file.
sudo rm /var/lib/NetworkManager/NetworkManager.state
# Restart network-manager service.
sudo service network-manager restart


Someone later down in the comments gave a cleaner less brute force way but this one is just pretty easy.

Thanks
Robert