As far as I can tell xdvi reads its resource file XDvi from /usr/share/texmf/xdvi/XDvi. Actually it does not contain an /etc/X11/app-defaults/XDvi file at all. Most system managers use that for system wide resources.
/etc/X11/app-defaults/, or /usr/X11R6/lib/X11/app-defaults/? We only have the /usr/ one at the moment. Do you think the XDvi file should move there, where all the others are?
Well, I looked at the xdvi INSTALL and Makefile and this version does not seem to look into any app-defaults directory! It just looks for $TEXMF/xdvi/XDvi file, which is what we already have. Normally all app-default files for X stuff should go into /usr/X11R6/lib/X11/app-defaults/ BUT if xdvi is not going to look in there there is no point putting one there. I guess we can close this one!...Thanks