ATI Video Fails with Adaptec 2940 SCSI Adapter on PCI Bus (122387)

SYMPTOMS

If a Windows NT computer has an ATI video adapter and an Adaptec 2940 SCSI controller on a PCI bus, you may experience the following behavior depending on which ATI video driver is installed:

   Video Driver     Behavior
   ---------------------------------------------------------------------
   ATI Mach 64 GX   When you select the Display icon in Control Panel, the
                    following error message appears:

WARNING: The Application got invalid data from the display driver. You used the down level graphic adapter driver. Contact the manufacturer for the current one.

   ATI Graphics     The system intermittently stops responding (hangs) or
   Pro Turbo        displays garbled output at the logon screen.

   ATI Mach64 PCI   The system hangs when you attempt to copy several large
                    files (totaling several megabytes).

RESOLUTION

To correct these problems, do one of the following:

Switch PCI expansion slot locations for the ATI video adapter and the Adaptec 2940 SCSI controller.
Contact Adaptec technical support at (800) 959-7274 for the latest ROM BIOS for the Adaptec 2940 SCSI controller (dated April 1994 or later).
Contact ATI Technical Support at (905) 882-2626 to verify that you have the latest ATI chip set number on the video card. ATI has reported that there are problems with video cards within a certain range of chip set numbers.

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