Re: 1.0.8174 DPI computation incorrect
Try using DISPLAYSIZE in the Monitor section. You need your monitor specs for the maximum display image size in milimeters. Then, if you turn off UseEdidDpi, X should compute the proper DPI for you. Then you can avoid using --dpi. To confirm, just type xdpyinfo | grep dimensions -A 2
dimensions: 1600x1200 pixels (363x272 millimeters)
resolution: 112x112 dots per inch
You'll get a display like this. which will show you. It's quirky that the display is measured in metric and DPI is in inches.