Running preview-latex in Emacs 25 on Ubuntu 18.04 once worked for me, but now inserts warning icons instead of rendered images of the formular snippets.

A minimal example, which doesn't work is:

$a = 1$

I carefully read the preview-latex manual on https://www.gnu.org/software/auctex/manual/preview-latex.html which mentions issues with gs < version 9.27 on https://www.gnu.org/software/auctex/manual/preview-latex.html#Known-problems.

The combination of tools used by preview-latex to generate preview image snippets is not trivial and indeed, I don't see any preview.dsc or *.png files generated by it on my setup.

Ubuntu 18.04 ships with gs version 9.26, but the solution suggested in preview-latex's section on known issues doesn't work, because the preview-pdf-adjust-color-method variable doesn't exist on Emacs 25.

Which additional diagnostics could I run to pin down the problem?

  • Which version of AUCTeX are you using, and how did you install it? Commented Mar 26 at 14:45
  • My AUCTeX version is 11.91 (installed as an Ubuntu package). Commented Mar 29 at 18:17
  • 11.91 is about 7 years old. Uninstall that package and install AUCTeX from ELPA with M-x list-packages <RET>, mark the auctex package for installation with i, and hit x to execute the installation procedure. You should get the version 13.2.4. If that doesn't work, download the tarball, uncompress and use M-x package-install-file RET to install it. Commented Mar 31 at 15:05


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