wireless network adapter supported on ubuntu?
Solution 1:
according to your terminal-output and dropbox-picture the chipset of your WIFI-adapter is a Ralink RT5390 and they open sourced this driver some years ago...!
according to this old tutorial it should work with every Linux Kernel above 3.x (this means Ubuntu 11.10) out of the box.
BUT as you can see in this thread there occur some problems...
- please check first if you really don't have turned off WIFI by a hardware switch!?! - or accidentally disabled the WIFI by software via rightclicking on the network-monitor or something...?
- consider to try out (via live medium) the current LTS (14.04 --> maybe it will be easier to maintain your system because 15.04 will be supported just until january 2016 and the 14.04 LTS until April 2019).
- however... if it remains not working there should be a solution:
just execute the steps on this page (a other network connection is required) and it should work... this solution is tested with 14.04 LTS but maybe it could also work with 15.04.