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bug#54784: Flatpak GTK apps cannot show pictures.
From: |
Zhu Zihao |
Subject: |
bug#54784: Flatpak GTK apps cannot show pictures. |
Date: |
Fri, 08 Apr 2022 12:35:42 +0800 |
User-agent: |
mu4e 1.6.10; emacs 27.2 |
# Main issue
Solanum in flatpak failed to render its logo.
# Reproduce step
Run
```
guix shell flatpak
flatpak install org.gnome.Solanum
flatpak run org.gnome.Solanum
```
# Investigation
The issue maybe caused by missing gdk pixbuf loaders. Try `flatpak run
--command=sh --devel org.gnome.Solanum` enter the debug shell of flatpak
and run `strace -o s.log solanum`. Found something like
```
openat(AT_FDCWD,
"/run/current-system/profile/lib/gdk-pixbuf-2.0/2.10.0/loaders.cache",
O_RDONLY) = -1 ENOENT (没有那个文件或目录)
...
access("/run/current-system/profile/share/themes/Adwaita/gtk-4.6/gtk.css",
F_OK) = -1 ENOENT (没有那个文件或目录)
access("/run/current-system/profile/share/themes/Adwaita/gtk-4.4/gtk.css",
F_OK) = -1 ENOENT (没有那个文件或目录)
access("/run/current-system/profile/share/themes/Adwaita/gtk-4.2/gtk.css",
F_OK) = -1 ENOENT (没有那个文件或目录)
access("/run/current-system/profile/share/themes/Adwaita/gtk-4.0/gtk.css",
F_OK) = -1 ENOENT (没有那个文件或目录)
...
openat(AT_FDCWD, "/run/current-system/profile/lib/gio/modules",
O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = -1 ENOENT (没有那个文件或目录)
```
It shows that flatpak is trying to load GTK related resource from
/run/current-system/profile. And use
```
flatpak run --filesystem=/gnu/store:ro --filesystem=/run/current-system:ro
org.gnome.Solanum
```
It works well.
# Related links
https://github.com/NixOS/nixpkgs/blob/master/pkgs/development/libraries/flatpak/bubblewrap-paths.patch
The solution of Nixpkgs is add these path and store to the flatpak
sandbox. I'm not sure whether it's good or not. Because user may want to
setup its own GUIX{2,3,4}_GTK_PATH and GDK_PIXBUF_LOADER_FILES.
--
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- bug#54784: Flatpak GTK apps cannot show pictures.,
Zhu Zihao <=