bug#57962: 29.0.50; Odd font choices

[Po Lu]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> Po Lu <luangruo@yahoo.com> writes:
>
>> What happens if you try setting it to each of the following in order?
>> (The list below was taken straight from xfns.c.)
>>
>> #if defined USE_CAIRO || defined HAVE_XFT
>>          /* This will find the normal Xft font.  */
>>          "monospace-10",
>> #endif
>>          "-adobe-courier-medium-r-*-*-*-120-*-*-*-*-iso8859-1",
>>          "-misc-fixed-medium-r-normal-*-*-140-*-*-c-*-iso8859-1",
>>          "-*-*-medium-r-normal-*-*-140-*-*-c-*-iso8859-1",
>>          /* This was formerly the first thing tried, but it finds
>>             too many fonts and takes too long.  */
>>          "-*-*-medium-r-*-*-*-*-*-*-c-*-iso8859-1",
>>          /* If those didn't work, look for something which will
>>             at least work.  */
>>          "-*-fixed-*-*-*-*-*-140-*-*-c-*-iso8859-1",
>>          "fixed",
>>
>> It's a long shot, but if it still doesn't work then I'm really out of
>> ideas.
>
> Well, the font Emacs has chosen for `default' is "-DAMA-Ubuntu
> Mono-regular-normal-normal-*-45-*-*-*-m-0-iso10646-1", so if I say
>
> (defface fixed-pitch
>   '((t :font "-DAMA-Ubuntu 
> Mono-regular-normal-normal-*-45-*-*-*-m-0-iso10646-1"))
>   "The basic fixed-pitch face."
>   :group 'basic-faces)
>
> then things look fine, of course.  But we want that to happen
> automatically (if `default' is using a fixed pitch font).

Yes, of course.  I have no idea how the default font is looked up, but
the list I sent is the list of defaults xfns.c tries if xsettings aren't
on (I thought font-use-system-font was on by default, but I was mistaken
there.)