Log spam: warning(gtk_ghostty_surface): gtk-xft-dpi was not set, using default value

[xandris]

Issue Description

When running under KDE and Wayland, Ghostty spams logs with:

warning(gtk_ghostty_surface): gtk-xft-dpi was not set, using default value
warning(gtk_ghostty_surface): gtk-xft-dpi was not set, using default value
warning(gtk_ghostty_surface): gtk-xft-dpi was not set, using default value
warning(gtk_ghostty_surface): gtk-xft-dpi was not set, using default value

Expected Behavior

Maybe warn once? Or not at all?

Actual Behavior

Spammy logs

Reproduction Steps

1. Run a Plasma Wayland session. Make sure to use the KDE desktop portal.
2. Start Ghostty.

Ghostty Logs

warning(gtk_ghostty_surface): gtk-xft-dpi was not set, using default value
warning(gtk_ghostty_surface): gtk-xft-dpi was not set, using default value
warning(gtk_ghostty_surface): gtk-xft-dpi was not set, using default value
warning(gtk_ghostty_surface): gtk-xft-dpi was not set, using default value

Ghostty Version

Ghostty 1.2.3

Version
  - version: 1.2.3
  - channel: stable
Build Config
  - Zig version   : 0.14.1
  - build mode    : builtin.OptimizeMode.ReleaseFast
  - app runtime   : apprt.Runtime.gtk
  - font engine   : font.main.Backend.fontconfig_freetype
  - renderer      : renderer.generic.Renderer(renderer.OpenGL)
  - libxev        : io_uring
  - kernel version: 6.19.6-gentoo-dist-hardened
  - desktop env   : other
  - GTK version   :
    build         : 4.20.3
    runtime       : 4.20.3
  - libadwaita    : enabled
    build         : 1.8.2
    runtime       : 1.8.2
  - libX11        : disabled
  - libwayland    : enabled

OS Version Information

Gentoo 2.18

(Linux only) Display Server

Wayland

(Linux only) Desktop Environment/Window Manager

KDE Plasma 6.6.2

Minimal Ghostty Configuration

# happens with an empty config

Additional Relevant Configuration

GSettings delegates to the desktop portal on Wayland:

https://docs.gtk.org/gtk4/class.Settings.html

On Wayland, the settings are obtained via a settings portal that is part of the Linux desktop APIs for application.

It tries to map to the setting group/key org.gnome.desktop.interface/text-scaling-factor. KDE doesn't report any settings under the org.gnome.desktop.interface group so I'm always going to get the default.

https://gitlab.gnome.org/GNOME/gtk/-/blob/main/gdk/wayland/gdksettings-wayland.c#L299

Ought GTK have a fallback? Should KDE emulate the gnome settings? IDK but I want Ghostty to stop warning me about it please!

I acknowledge that:

• I have reviewed the FAQ and confirm that my issue is NOT among them.
• I have searched the Ghostty repository (both open and closed Discussions and Issues) and confirm this is not a duplicate of an existing issue or discussion.
• I have checked the "Preview" tab on all text fields to ensure that everything looks right, and have wrapped all configuration and code in code blocks with a group of three backticks (```) on separate lines.

[xandris]

Uh should I open a PR that throttles this warning? Maybe like once per process?

[jcollie]

!vouch

[jcollie]

Yeah a PR would be great!

[jcollie]

#14410