I now have a working X on my Linux box with the Trident 9440 card.
I am using the AcceleratedX beta by Xinside. It is commercial software
in demo form, only 3 clients. enough to be useful, and limited enough
to make you want to buy the real thing. It is running 600X800 256
colors with no problem. It's a good program.
location. I am grateful to Xinside for their assistance.