How to Install an ATI Driver in Ubuntu Ultimate Edition

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    Installing the Driver

    • 1). Open a terminal window which will be found under the "Accessories" section of the "Applications" menu.

    • 2). Type the command "lspci -nn | grep VGA" to determine the graphics card name and chipset. You will get output that looks like:
      01:05.0 VGA compatible controller [0300]: ATI Technologies Inc RS690M [Radeon X1200 Series] [1002:791f]

    • 3). Type the command "sudo apt-get remove --purge xorg-driver-fglrx" to remove the "fglrx" driver. The "fglrx" driver conflicts with the open source "radeon" driver and can cause performance issues.

    • 4). Reboot the computer.

    • 5). Type the command "sudo apt-get install --reinstall libgl1-mesa-glx libgl1-mesa-dri" to ensure that the proper libraries are installed.

    • 6). Type the command "sudo gedit /etc/modules" and remove the "fglrx" entry, if necessary.

    Edit Xorg.conf

    • 1). Type the command "sudo gedit /etc/X11/xorg.conf" to open the xorg.conf file.

    • 2). Change or create the entry for the graphics card to look like:
      Section "Device"
      Identifier "Radeon 9600"
      Driver "ati"
      BusID "PCI:1:5:0"
      Option "XAANoOffscreenPixmaps"
      The "Identifier" entry can be any descriptive name. The PCI number is found out the beginning of the output in step 2. In this example, 01:05.0.

    • 3). Change the "Screen" section to reflect the identifier in the "Device" section. It should look similar to:
      Section "Screen"
      Identifier "Default Screen"
      Device "Radeon 9600"
      Monitor "Generic Monitor"
      DefaultDepth 24
      SubSection "Display"
      Depth 24
      Modes "1440x900" "1024x768"

    • 4). Add the two following sections to the Xorg.conf file, if it doesn't already exist:
      Section "DRI"
      Mode 0666

      Section "Extensions"
      Option "Composite" "Enable"

    • 5). Check that the "ServerLayout" section reflects the screen identifier from step 9.

    • 6). Save and close the Xorg.conf file.

    • 7). Press the "Ctrl," "Alt" and "Backspace" keys simultaneously to restart the X server.

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