I had the same problem with Kubuntu 10.04 (release). My laptop could not wake up from suspend to RAM (which was the default action on close lid). I had to restart it from the button. In the file /var/lib/NetworkManager/NetworkManager.state i found:
NetworkingEnabled=false
After changing it to true ( as suggested here http://wwww.ubuntuforums.org/showthread.php?p=9219714 ) and restarting it worked.
I had the same problem with Kubuntu 10.04 (release). NetworkManager/ NetworkManager. state i found:
My laptop could not wake up from suspend to RAM (which was the default action on close lid). I had to restart it from the button.
In the file /var/lib/
NetworkingEnabl ed=false
After changing it to true ( as suggested here http:// wwww.ubuntuforu ms.org/ showthread. php?p=9219714 ) and restarting it worked.