12.04 Ubuntu: configuring laptop to hook up to tv using hdmi cable?

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http://askubuntu.com – I'm trying to use an hdmi cable to connect my HP dv5 notebook to a 32" Sony Bravia tv in order to watch Hulu stuff on a bigger screen. However, Google has been thoroughly unhelpful thus far! When I hook the computer up to the tv using the Windows partition, it automatically switches the display settings so that the sound and video on the tv are synced up with what's on the laptop screen. In the Ubuntu partition,I think that it's detecting the tv as another monitor rather than as a tv, so I get a dual monitor display, which I don't want! Plus, the sound is coming out of the laptop rather than (HowTos)