Hi Rutherther,
I checked and both xdg-desktop-portal and xdg-desktop-portal-wlr
are running and can be accessed on the dbus.
xdg-desktop-portal-wlr has the property ScreenCast that is asked
for by firefox but the property is not exposed by
xdg-desktop-portal. I'm currently checking why that is so. I
killed and restarted both (in both orders) but the result
remains. firefox askes xdg-desktop-portal for property ScreenCast
and then sharing failes.
Cheers
Alex
On Thu, Jan 15 2026, 16:40:58, Rutherther <[email protected]>
wrote:
Hi,
Alexander Asteroth <[email protected]> writes:
Hi Rutherther,
thanks a lot for your explanations.
After removing
exec $HOME/.guix-home/profile/libexec/xdg-desktop-portal -r
/dev/null 2>&1 &
exec $HOME/.guix-home/profile/libexec/xdg-desktop-portal-wlr
-r
/dev/null 2>&1 &
and starting sway without dbus-run-session screensharing worked
under jitsi in firefox.
I stopped sway logged out and started it again and it still
worked.
I should have stopped then and be happy but I continued...
Next thing I tried was if I can also remove
$HOME/.guix-home/profile/bin/dbus-update-activation-environment
--systemd WAYLAND_DISPLAY XDG_CURRENT_DESKTOP=sway >/dev/null
2>&1
Right, you cannot remove that. Then xdg-desktop-portal doesn't
know.
What the display is (WAYLAND_DISPLAY) neither that it should use
wlr
(XDG_CURRENT_DESKTOP).
or `(service home-pipewire-service-type)`.
Pipewire service is a dependency of xdg desktop portal wlr
implementation, so also not surprising.
Neither worked, so I put both in again and guess what,
screensharing doesn't work.
I logged out, rebooted, repeated the first steps, nothing
helps.
So `herd status pipewire` now returns it's running, is that
right?
I tried to debug the dbus while trying to activate
screensharing. There is an error, when I try to actiate
screensharing but I'm not a dbus expert so I have no idea what
goes wrong.
error time=1768490440.178991 sender=:1.35 -> destination=:1.34
error_name=org.freedesktop.DBus.Error.InvalidArgs
reply_serial=136
string "No such interface
“org.freedesktop.portal.ScreenCast”"
Sounds like xdg-desktop-portal got uninstalled. Are you sure you
still
have
`$HOME/.guix-home/profile/share/dbus-1/services/org.freedesktop.portal.Desktop.service`?
If so, try starting `xdg-desktop-portal` with -rv and reply with
the log
you got out of that. In case it starts working after you start
it
manually, it likely means the original process did not have the
right
environment that you tried to set.
That can happen in case an application tries to request any of
the
interfaces prior to you running
`dbus-update-activation-environment`.
Ensure that is the first thing that runs prior to any programs.
Rutherther
