[Pkg-utopia-maintainers] Bug#1037447: pipewire[…]: mod.rt: Can't find org.freedesktop.portal.Desktop. Is xdg-desktop-portal running?

[AlMa]

On another, very similar computer with Debian stable “bookworm“, I find 
similar “Can't find …” messages. Here, pipewire presents the annoying 
message first, i.e., before wireplumber:

Jun 13 21:00:20 AnonymizedMachineName systemd[1095]: Started 
wireplumber.service - Multimedia Service Session Manager.
Jun 13 21:00:20 AnonymizedMachineName systemd[1095]: Started 
pipewire-pulse.service - PipeWire PulseAudio.
Jun 13 21:00:20 AnonymizedMachineName kernel: a8293 19-000b: Allegro 
A8293 SEC successfully attached
Jun 13 21:00:20 AnonymizedMachineName systemd[1095]: Starting 
dbus.service - D-Bus User Message Bus...
Jun 13 21:00:20 AnonymizedMachineName /usr/libexec/gdm-x-session[1154]: 
(--) Log file renamed from 
"/var/lib/gdm3/.local/share/xorg/Xorg.pid-1154.log" to 
"/var/lib/gdm3/.local/share/xorg/Xorg.0.log"
Jun 13 21:00:20 AnonymizedMachineName /usr/libexec/gdm-x-session[1154]: 
X.Org X Server 1.21.1.7
Jun 13 21:00:20 AnonymizedMachineName /usr/libexec/gdm-x-session[1154]: 
X Protocol Version 11, Revision 0
Jun 13 21:00:20 AnonymizedMachineName /usr/libexec/gdm-x-session[1154]: 
Current Operating System: Linux AnonymizedMachineName 6.1.0-9-amd64 #1 
SMP PREEMPT_DYNAMIC Debian 6.1.27-1 (2023-05-08) x86_64
Jun 13 21:00:20 AnonymizedMachineName /usr/libexec/gdm-x-session[1154]: 
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-6.1.0-9-amd64 
root=UUID=AnonymizedLongID ro vga=842
Jun 13 21:00:20 AnonymizedMachineName /usr/libexec/gdm-x-session[1154]: 
xorg-server 2:21.1.7-3 (https://www.debian.org/support)
Jun 13 21:00:20 AnonymizedMachineName /usr/libexec/gdm-x-session[1154]: 
Current version of pixman: 0.42.2
Jun 13 21:00:20 AnonymizedMachineName /usr/libexec/gdm-x-session[1154]: 
        Before reporting problems, check http://wiki.x.org
Jun 13 21:00:20 AnonymizedMachineName /usr/libexec/gdm-x-session[1154]: 
        to make sure that you have the latest version.
Jun 13 21:00:20 AnonymizedMachineName /usr/libexec/gdm-x-session[1154]: 
Markers: (--) probed, (**) from config file, (==) default setting,
Jun 13 21:00:20 AnonymizedMachineName /usr/libexec/gdm-x-session[1154]: 
        (++) from command line, (!!) notice, (II) informational,
Jun 13 21:00:20 AnonymizedMachineName /usr/libexec/gdm-x-session[1154]: 
        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
Jun 13 21:00:20 AnonymizedMachineName /usr/libexec/gdm-x-session[1154]: 
(==) Log file: "/var/lib/gdm3/.local/share/xorg/Xorg.0.log", Time: Tue 
Jun 13 21:00:20 2023
Jun 13 21:00:20 AnonymizedMachineName /usr/libexec/gdm-x-session[1154]: 
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
Jun 13 21:00:20 AnonymizedMachineName systemd[1095]: Started 
dbus.service - D-Bus User Message Bus.
Jun 13 21:00:20 AnonymizedMachineName dbus-daemon[1152]: [session 
uid=119 pid=1152] Activating systemd to hand-off: service 
name='org.gtk.vfs.Daemon' unit='gvfs-daemon.service' requested by ':1.3' 
(uid=119 pid=1147 comm="/usr/libexec/tracker-extract-3")
Jun 13 21:00:20 AnonymizedMachineName /usr/libexec/gdm-x-session[1154]: 
(==) No Layout section.  Using the first Screen section.
Jun 13 21:00:20 AnonymizedMachineName /usr/libexec/gdm-x-session[1154]: 
(==) No screen section available. Using defaults.
Jun 13 21:00:20 AnonymizedMachineName /usr/libexec/gdm-x-session[1154]: 
(**) |-->Screen "Default Screen Section" (0)
Jun 13 21:00:20 AnonymizedMachineName /usr/libexec/gdm-x-session[1154]: 
(**) |   |-->Monitor "<default monitor>"
Jun 13 21:00:20 AnonymizedMachineName pipewire[1146]: mod.rt: Can't find 
org.freedesktop.portal.Desktop. Is xdg-desktop-portal running?
Jun 13 21:00:20 AnonymizedMachineName dbus-daemon[818]: [system] 
Activating via systemd: service name='org.freedesktop.RealtimeKit1' 
unit='rtkit-daemon.service' requested by ':1.25' (uid=119 pid=1148 
comm="/usr/bin/wireplumber")
Jun 13 21:00:20 AnonymizedMachineName /usr/libexec/gdm-x-session[1154]: 
(==) No monitor specified for screen "Default Screen Section".
Jun 13 21:00:20 AnonymizedMachineName /usr/libexec/gdm-x-session[1154]: 
        Using a default monitor configuration.
Jun 13 21:00:20 AnonymizedMachineName /usr/libexec/gdm-x-session[1154]: 
(==) Automatically adding devices
Jun 13 21:00:20 AnonymizedMachineName /usr/libexec/gdm-x-session[1154]: 
(==) Automatically enabling devices
Jun 13 21:00:20 AnonymizedMachineName /usr/libexec/gdm-x-session[1154]: 
(==) Automatically adding GPU devices
Jun 13 21:00:20 AnonymizedMachineName /usr/libexec/gdm-x-session[1154]: 
(==) Automatically binding GPU devices
Jun 13 21:00:20 AnonymizedMachineName /usr/libexec/gdm-x-session[1154]: 
(==) Max clients allowed: 256, resource mask: 0x1fffff
Jun 13 21:00:20 AnonymizedMachineName pipewire[1146]: mod.rt: found 
session bus but no portal
Jun 13 21:00:20 AnonymizedMachineName dbus-daemon[1152]: [session 
uid=119 pid=1152] Successfully activated service 'org.freedesktop.systemd1'
Jun 13 21:00:20 AnonymizedMachineName /usr/libexec/gdm-x-session[1154]: 
(WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist.
Jun 13 21:00:20 AnonymizedMachineName /usr/libexec/gdm-x-session[1154]: 
        Entry deleted from font path.
Jun 13 21:00:20 AnonymizedMachineName wireplumber[1148]: Can't find 
org.freedesktop.portal.Desktop. Is xdg-desktop-portal running?

Here, wireplumber 0.4.13-1 and pipewire:amd64 0.3.65-3 are installed.  I 
have no idea whether the pipewire issue 3194 at gitlab.freedesktop.org 
resolves it or not.