I found some info regarding this on www.nvnews.net and in the README for the nvidia driver - apparently the "UseEdidDpi" option has some problems in the 8174 version of the driver. I added the following lines to the "Device" section of my xorg.conf and the problem seems to be solved. Option "UseEdidDpi" "FALSE" Option "DPI" "76 x 72" Thanks -- David Bruce