Video drivers are software. Your ATI video card works fine. People running Windows have problems. Your video drivers are written by XFree86 contributors. Windows users' video drivers are written by ATI.


The point was, I'm not running Windows, so there is no ATI software for me to try.

You are doubtless correct; I've heard such complaints before. You won't like my answer, so I won't give it, but you're welcome to read between the lines and flame me for it