Ubuntu 12.10 ati drivers

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http://askubuntu.com – I have a problem with my video driver on ubuntu 12.10. I had the same problem till I had 12.04. I tried almost everything on the Internet about ATI drivers install but all of them returned me low graphic errors or other errors. I have a 5470 ATI card and I want to plug my second monitor to the laptop so I can have 2 monitors, thats why I need the catalyst (except if this can happens without catalyst). I read that 5xxx drivers of ATI have many problems with Ubuntu. Is there any way to install drivers? (HowTos)