Adam Williamson (awilliam@redhat.com) said:
http://git.gnome.org/browse/gnome-settings-daemon/tree/data/org.gnome.settin... and: http://git.gnome.org/browse/gnome-settings-daemon/tree/plugins/xsettings/gsd...
So if you didn't much about with the default configuration (or inherited it from a GNOME 2.x installation), we use the X server's DPI.
ack. so it's X's decision to default to 96dpi now? Because that's certainly what happens; I boot F15 on my P and I get almost literally unreadable font sizes.
I don't know about 'now'... just did a brief test on a variety of machines here running both older and newer OSes, and it defaults to 96dpi on all of them (and all of them have EDIDs with geometry.)
Bill