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.