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I have installed "Additional Drivers" but there is a problem with ATI Catalyst Control Centre:

There is no ATI graphics driver installed or it is not functioning properly

I have downloaded the appropriate file from the ATI site. What terminal commands do I need to use to install from this file?

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chmod +x
sudo ./

you can also try sudo sh instead of the second line above

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Thank you. "sh" did it for me. Eddie – user9798 Jan 28 '11 at 21:30
@ECloudh Don't forget to accept this answer as the solution! (Check the little checkmark) – Jorge Castro Feb 1 '11 at 0:26

I've had this issue before, I found this wiki site that has a comprehensive guide quite helpful, even though it is not official ATI link directly to it from the driver download site.

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