I recently installed ubuntu 13.10 onto a desktop computer - dual boot with windows 7 - , however the system would always fail to connect to my wifi network. I decided it would be better to upgrade to 14.04 before trying to fix any problems, and at first 14.04 appeared to have the same problem. It did, however, connect on second try! But I have since only been able to connect perhaps 50-60% of the time, and often it will disconnect after some time. This is extremely frustrating, and over the last couple of days I have been wanting to ssh to the system to play with the nix terminal and become aquainted with git + bitbucket and/or github. My network never fails to be found, it just often fails to connect! The system uses the following wifi reciever - Edimax EW-7811UN 150Mbps Wireless Nano USB Adapter - and it works fine on windows 7! I am guessing it is either a driver problem or an ubuntu bug?! I have tried to go to additional drivers and change to the broadcom listing , but that always fails to change.. what would you advise? has anyone experienced this problem?