Sorry if this has been addressed elsewhere, I couldn't find any reference to it. I have an ATI Radeon HD4870 and have been trying to get Ubuntu 12.10 drivers for it -- without them, the GPU temperature reaches 70-80oC.
I don't have any additional drivers in my setting system -- which is how I addressed the drivers for my laptop. I found a manual installation page, but following it led to me losing all visual drivers of any kind (no windows, sidebars etc) and had to uninstall.
Does anybody have any tips or has anybody managed to get HD4870 drivers working on Ubuntu?