I have an IBM Thinkpad T40p. It has an ATI Mobility Fire GL 9000 and a built-in 1400x1050 display. I have it hooked up to an external monitor on a docking station. When the screen is set to 1400x1050, the image on the external monitor pans with the movement of the mouse. I know the monitor is capable of up to 1600x1200 and that is listed in one of the modes. I tried adding a 1400x1050 mode with an ini file and that didn't work. I might not have done it right or the hardware (or the driver) below the level of the ini file is actually reading the monitor and the monitor is reporting back it's modes. Those modes include 1280x1024 and 1600x1200 but not 1400x1050. So it decides to pan the 1400x1040 image on the monitor in 1280x1024 mode.

Is there a way to turn this panning off? Will the monitor actually display a 1400x1050 image?

Very few standard monitors will display anything between 1280 and 1600. Maybe one of the newer widescreen TFT's will do it.

Your best bet is probably to change your screensettings to something your external monitor can display when using it.

The monitor I have is actually an analog monitor off a VGA connector not a TFT. I haven't been able to find a TFT that supported 1400 (other than one built into a laptop). Shouldn't the analog nature of the CRT support any incremental resolution?