Re: Font size

[Kévin Le Gouguec]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Kévin Le Gouguec <kevin.legouguec@gmail.com>
>> Date: Wed, 04 Aug 2021 14:53:04 +0200
>> Cc: Yuuki Harano <masm+emacs@masm11.me>, Eli Zaretskii <eliz@gnu.org>
>> 
>> $ gsettings set org.gnome.desktop.interface monospace-font-name 'DejaVu Sans 
>> Mono 10.5'
>> 
>> Emacs emits a warning:
>> 
>> > set-face-attribute: Font not available: #<font-spec nil nil DejaVu\
>> > Sans\ Mono\ 10\.5 nil nil nil nil nil nil nil nil nil ((:name
>> > . "DejaVu Sans Mono 10.5") (:user-spec . "DejaVu Sans Mono 10.5"))>
>> 
>> Is this expected?
>
> I don't know if it's expected, but the error message says that the
> "10.5" part is not expected there.  What happens if you use "10"
> instead of "10.5"?

Cf. the paragraph just above:

> On master --with-gconf and feature/pgtk, with font-use-system-font set
> to t, here is what C-u C-x = says for various GSettings:
> 
> GSettings³      C-u C-x =
> 9               12
> 10              13
> 10.5            ERROR (see below)
> 11              15
> 
> ³ "XX" in "gsettings org.gnome.desktop.interface monospace-font-name 'DejaVu 
> Sans Mono XX'"

What I don't understand:

1. How come GSettings/Xresources and Emacs use different "units"?
   (Apologies if the answer lies somewhere in the manual, which it most
   certainly does)

2. Why does 10.5 work with Xresources and not GSettings?