efaq: Emacs ignores X resources

 
 6.6 Why does Emacs ignore my X resources (my .Xdefaults file)?
 ==============================================================
 
 As of version 19, Emacs searches for X resources in the files specified
 by the following environment variables:
 
    • ‘XFILESEARCHPATH’
    • ‘XUSERFILESEARCHPATH’
    • ‘XAPPLRESDIR’
 
    This emulates the functionality provided by programs written using
 the Xt toolkit.
 
    ‘XFILESEARCHPATH’ and ‘XUSERFILESEARCHPATH’ should be a list of file
 names separated by colons.  ‘XAPPLRESDIR’ should be a list of directory
 names separated by colons.
 
    Emacs searches for X resources:
 
   1. specified on the command line, with the ‘-xrm RESOURCESTRING’
      option,
 
   2. then in the value of the ‘XENVIRONMENT’ environment variable,
 
         − or if that is unset, in the file named ‘~/.Xdefaults-HOSTNAME’
           if it exists (where HOSTNAME is the name of the machine Emacs
           is running on),
 
   3. then in the screen-specific and server-wide resource properties
      provided by the server,
 
         − or if those properties are unset, in the file named
           ‘~/.Xdefaults’ if it exists,
 
   4. then in the files listed in ‘XUSERFILESEARCHPATH’,
 
         − or in files named ‘LANG/Emacs’ in directories listed in
           ‘XAPPLRESDIR’ (where LANG is the value of the ‘LANG’
           environment variable), if the ‘LANG’ environment variable is
           set,
         − or in files named Emacs in the directories listed in
           ‘XAPPLRESDIR’
         − or in ‘~/LANG/Emacs’ (if the ‘LANG’ environment variable is
           set),
         − or in ‘~/Emacs’,
 
   5. then in the files listed in ‘XFILESEARCHPATH’.