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I have an ati HD4850 card, ubuntu 12.04.1 LTS. To begin with, after a fresh install, i installed fglrx drvers from system -- additional drivers, according to fglrxifo everything was alright, but the system was running on vesa:sem.

After that, i have reinstalled and installed drivers according to many tutorials, but still got that problem. one of the tutorials was here: What is the correct way to install ATI Catalyst Video Drivers (fglrx)?

of course, i attempted to install 12.6 driver

Now i have a fresh install of ubuntu and don't want to touch anything without anyone's support, because my 3 days nightmare didn't give results.

what must i do to have an adequate performance of video card?

Thanks in advance.

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