How to change the display's dots per inch setting

[Tom Horsley]

On Sat, 12 May 2012 14:49:49 -0400
Sam Varshavchik wrote:

> There should be an easy way I can tell Xorg what my real DPI is, so  
> everything looks sane.

Welcome to the twilight zone:

https://bugzilla.redhat.com/show_bug.cgi?id=451562

The simplest fix is to switch to KDM for your login manager and
add the -dpi 140 option to the X server args.