[ubuntu] multi display setup using ATI Radeon HD 4290

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http://ubuntuforums.org – Hi All, I have two monitors connected to my Desktop. One is 22" Dell monitor connected by means of a VGA cable and a 24" Dell monitor connected via DVI cable. I have installed the ATI driver and I have ubuntu 11.10 installed. I see a cloned display. However, I would like to set up such that the two screens act as one large display. To accomplish this, I opened the catalyst control center and chose multi-display desktop with display(s). When I click Ok, the catalyst control center screen vanishes and nothing happens. When I go back to the catalyst control center, the multidisplay (Hardware)