The 9000 series ATI cards have had that "black dot" syndrome for years.  There was only one video driver (Catalyst 4.8, if I recall), from ATI, which did not have that bug and that driver will no longer work correctly (circa 2000).
It is a video card driver bug ATI has not corrected, for the 9000 series.  The 9000 series is over 10 years old now.