Qt5ct crash after trying to change the font in Gnome

[Weg]

the police of my qt apps is too small. So I tryed to change the police with qt5ct. But when I clic on the “…“, the program crash. If I launch it with the command line, I can get the error :

Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.
Configuration path: "/home/matt/.config/qt5ct"
Shared QSS paths: ("/home/matt/.local/share/qt5ct/qss", "/home/matt/.local/share/flatpak/exports/share/qt5ct/qss", "/var/lib/flatpak/exports/share/qt5ct/qss", "/usr/local/share/qt5ct/qss", "/usr/share/qt5ct/qss", "/var/lib/snapd/desktop/qt5ct/qss")
Shared color scheme paths: ("/home/matt/.local/share/qt5ct/colors", "/home/matt/.local/share/flatpak/exports/share/qt5ct/colors", "/var/lib/flatpak/exports/share/qt5ct/colors", "/usr/local/share/qt5ct/colors", "/usr/share/qt5ct/colors", "/var/lib/snapd/desktop/qt5ct/colors")

(process:23106): Gtk-CRITICAL **: 20:35:41.767: _gtk_style_provider_private_get_settings: assertion 'GTK_IS_STYLE_PROVIDER_PRIVATE (provider)' failed

(process:23106): Gtk-CRITICAL **: 20:35:41.767: _gtk_style_provider_private_get_settings: assertion 'GTK_IS_STYLE_PROVIDER_PRIVATE (provider)' failed

(process:23106): Gtk-CRITICAL **: 20:35:41.767: _gtk_style_provider_private_get_settings: assertion 'GTK_IS_STYLE_PROVIDER_PRIVATE (provider)' failed
zsh: segmentation fault (core dumped)  qt5ct

aren’t assertion supposed to be used only in debug mode ?
I tried to reinstall qt5ct without success.
I you don’t know how to repair qt5ct, but you know how to change it’s configuration manually, it is enough for me. I just want to change the font size, if it is just a file to edit it is ok too.

[Fabby]

Does this problem also happen when you create a new user and log in there? (E.G. weg2)

P.S. “The police” = “La policía”

[Weg]

Yes. Exactly the same.

And yes, I mean the font, not the police. Sorry.

[Fabby]

As I’m on KDE, that’s as much as I can help you. Let’s hope a Gnome expert can help you more efficiently!

[Hanzel]

Is this something you could try to fix with the kvantum manager and configure the QT font to be a step larger?

[hilex]

The same problem here. I’d like to get help too.

[KedricPon]

How you edit the fonts size? Describe in detail

[hilex]

I’m just going to push the button. And after the try the window is closed. That’s all.

[KedricPon]

That is not very detailed LMAO.

[hilex]

Well, I launch qt5ct, follow fonts category, push the button to choose any other font and… voila! …window flies into skies. Good bye window. ) qt5ct is closed without asking my sanction.

[Hanzel]

Tried this on a clean pahvo install and can reproduce the behavior @hilex describes.

$ qt5ct                                                           
Configuration path: "/home/h/.config/qt5ct"
Shared QSS paths: ("/home/h/.local/share/qt5ct/qss", "/home/h/.local/share/flatpak/exports/share/qt5ct/qss", "/var/lib/flatpak/exports/share/qt5ct/qss", "/usr/local/share/qt5ct/qss", "/usr/share/qt5ct/qss", "/var/lib/snapd/desktop/qt5ct/qss")
Shared color scheme paths: ("/home/h/.local/share/qt5ct/colors", "/home/h/.local/share/flatpak/exports/share/qt5ct/colors", "/var/lib/flatpak/exports/share/qt5ct/colors", "/usr/local/share/qt5ct/colors", "/usr/share/qt5ct/colors", "/var/lib/snapd/desktop/qt5ct/colors")

1 Navigate to font tab
2 click on

Window closes and outputs this to stdout:

(process:1562): Gtk-CRITICAL **: 18:16:15.936: _gtk_style_provider_private_get_settings: assertion 'GTK_IS_STYLE_PROVIDER_PRIVATE (provider)' failed

(process:1562): Gtk-CRITICAL **: 18:16:15.936: _gtk_style_provider_private_get_settings: assertion 'GTK_IS_STYLE_PROVIDER_PRIVATE (provider)' failed

(process:1562): Gtk-CRITICAL **: 18:16:15.936: _gtk_style_provider_private_get_settings: assertion 'GTK_IS_STYLE_PROVIDER_PRIVATE (provider)' failed
zsh: segmentation fault (core dumped)  qt5ct

The output does give some results when searching but nothing that shines like a solution to me, all is application specific.

[thomasongwae]

Just delete the folder qt5ct in .config folder in your home directory

[Weg]

It seems it work. Thank you very much.