The Greenfield Festival is one of the most important festivals in Switzerland. It became a national mecca of new and old music. This will be the 7th edition and once again there aren't more bands confirmed at the moment.
For The Greenfield Festival is only three-day passes. Camped on the grounds and the shuttle from the train station are free for the visitors
At the moment, there isn't much information, official links below.
Site: http://www.greenfieldfestival.ch English version: http://www.greenfieldfestival.ch/english/
Facebook Page: http://www.facebook.com/greenfieldfestival.ch
Tickets on sale http://www.ticketcorner.ch