emacs-mode-auctex-11.84-alt1
emacs22-common-22.1-alt2
evince-gtk-2.20.1-alt0.M40.5
пакет xpdf не установлен

I opened a LaTeX file, toggled the menu option "Command > TeXing options > PDF mode", C-c C-c (LaTeX), C-c C-c (View), and it wanted to run:

xpdf -remote a -raise a.pdf 

although xpdf is not installed on this system (ALT Lite 4.0.3). But evince-gtk is.

Expected: AUCTeX detects the installed program to view PDF, and uses it. (A trivial thing in modern times; something like that is expected from an OS nowadays, not manual setup of viewers for different types of files.)

Comments on implementation of the feature: AFAIR, similar features for DVI (whether xdvi is available), dvips, dvilj etc. were implemented by making tetex-{xdvi,dvips,dvilj} put a scriptlet into /etc/emacs/site-start.d/ , which sets thevalues of the relevant Emacs variables. Perhaps, all the PDF viewers should put such a scriptlet to /etc/emacs/site-start.d/ , to inform Emacs how it can be used to view PDF.

Another way would be to use the more common "database" of filetype-program associations (I don't know how it is called), so that Emacs just gives a command like "open a.pdf", and the system decides which program that is available to use.