Graphics card is reported as: VIA Technologies Inc, KM400/KN400/P4M800 [S3 UniChrome] Rev01. The driver is whatever Ubuntu decided to use when I installed it. I don't know how to find out what it is using. System-> Administration->Hardware Drivers reports that "No proprietry drivers are in use on this system". I found what appears to be a compatible driver on the VIA Technologies website, but installing it is proving to be anything but straightforward. The installation script is currently telling me that it can't find a VIA graphics card. I'll keep pursuing this. Thanks again. Dunc