[ubuntu] Ati Radeon HD 4670 Driver Problem

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http://ubuntuforums.org – So, today i've got a fresh install of 12.10 x64 on my pc.Everything was fine except video driver.I've downloaded video driver from ati's website.Installation was successfully too.Then i did reboot, and after reboot compiz won't work. I did compiz --replace but that doesn't help.So, only way to get back unity was to uninstall ati driver through terminal.After that, i did reboot and everything was fine but i don't have video driver. So, does anybody know why compiz isn't working when video driver is installed?And also, are there some unofficial video drivers for ati radeon hd 4670 because i (Hardware)