Why ediff not show different on files?

[alexei-28]

Linux Mint 20, Emacs 27.2, vdiff -20210426.155

I create two files. And want to find difference in it.

M-x vdiff-files
Select file1.txt and file2.txt

Here result.

As you can see both files has different contents(last char in every row).

Why vdiff not show this differents?

[justbur]

It might be that the theme you are using does not define a different face. vdiff defaults to using the diff-changed face, but not all themes customize it.

[alexei-28]

It might be that the theme you are using does not define a different face. vdiff defaults to using the diff-changed face, but not all themes customize it.

Yes, the problem was in color theme

[pedro-nonfree]

when the diff is small or the files are recent, the diff is not performed, in my case (vdiff-refresh) helped

anyway, @alexei-28 if your issue is solved, close it :)