Portal desktop : FileChooser missing.

[lidgnulinux]

I install cosmic desktop alpha 6 and when I want to change the background cosmic-settings complaints that org.freedesktop.portal.FileChooser not found. I already have xdg-dekstop-portal & xdg-desktop-portal-gtk installed. What could be wrong here ? I built the xdg-dekstop-portal & xdg-desktop-portal-gtk without gtk4 and qt support / only gtk3, is that related ?

I'm using Linux From Scratch 12.2 (Systemd). If it's related I have log. Thanks.
cosmic.log.txt

[Drakulix]

You need xdg-desktop-portal-cosmic

[lidgnulinux]

I already have xdg-desktop-portal-cosmic and it's running.

[Drakulix]

In that case I would advise to check the configuration in /usr/share/xdg-desktop-portal on your system.

E.g.:

cat /usr/share/xdg-desktop-portal/cosmic-portals.conf

[preferred]
default=cosmic;gtk;
org.freedesktop.impl.portal.Secret=gnome-keyring;

cat /usr/share/xdg-desktop-portal/portals/cosmic.portal

[portal]
DBusName=org.freedesktop.impl.portal.desktop.cosmic
Interfaces=org.freedesktop.impl.portal.Access;org.freedesktop.impl.portal.FileChooser;org.freedesktop.impl.portal.Screenshot;org.freedesktop.impl.portal.Settings;org.freedesktop.impl.portal.ScreenCast
UseIn=COSMIC

If that still doesn't help, you could check the logs of the cosmic-portal: journalctl --user -e _COMM=cosmic-session | grep xdg-desktop-portal

[lidgnulinux]

I have those config files, when I ran journalctl --user -e _COMM=cosmic-session | grep xdg-desktop-portal I got this :

Apr 10 07:52:41 lidg-lfs cosmic-session[625]: starting process ' WAYLAND_DISPLAY=wayland-1 XDG_SESSION_TYPE=wayland WAYLAND_SOCKET=78 PORTAL_WAYLAND_SOCKET=75 /usr/libexec/xdg-desktop-portal-cosmic '
Apr 10 07:52:42 lidg-lfs cosmic-session[625]: Failed to spawn scope for /usr/libexec/xdg-desktop-portal-cosmic. Creating transient unit failed with org.freedesktop.DBus.Error.Spawn.ChildExited: Process org.freedesktop.systemd1 exited with status 1

[lidgnulinux]

I ended up launch cosmic using cosmic-session instead of start-cosmic wrapper script. File chooser & screenshot now works.