Launching Niri WM with Greetd Tuigreet

[ConsularParadi]

Hi, I have been unable to setup niri with greetd and tuigreet such that it can interact with the xdp-gnome for screensharing.
What has been mentioned in the niri docs is that if running without a window-manager, run niri-session to start a systemd service and import all required variables.
Here is what the desktop entry for niri looks like:

[Desktop Entry]
Name=Niri
Comment=A scrollable-tiling Wayland compositor
Exec=niri-session
TryExec=niri
Type=Application
DesktopNames=niri

And here is how my greetd config looks like

[terminal]
vt = 1
[default_session]
command = "tuigreet --cmd niri"  
user = "greeter"

It seems that the niri service is not loaded upon login

systemctl --user status niri
○ niri.service - A scrollable-tiling Wayland compositor
     Loaded: loaded (/usr/lib/systemd/user/niri.service; static)
     Active: inactive (dead)

Even if running only tuigreet without --cmd niri, I'm thrown into a tty session and the actual window manager is not launched neither running as a service.
It works when I login through tty and run niri-session.

[apognu]

What if you use --cmd niri-session? Using the cmd option or writing an ad-hoc CMD with F2 runs the specific command, not a session file with the same name.

If you want to select the session from the desktop file you use, you can use F3 from tuigreet.

Does this help?

[ConsularParadi]

Choosing the session as well as using cmd niri-session takes me to the tty where when status of the niri service is checked using systemctl --user status niri, it shows that the service is inactive(dead)
What I have discovered during this is that when I enter the tty session using the above methods and press Ctrl+d, it leads me to my WM session where the niri service is active.

[ToxicMushroom]

if it helps you @ConsularParadi this is how I launch sway, these XDG flags are required for portals to work correctly afaik:

export XDG_CURRENT_DESKTOP=sway
export XDG_SESSION_DESKTOP=sway
export XDG_SESSION_TYPE=wayland
# export VDPAU_DRIVER=radeonsi

sway -d 2> ~/sway.log

+

merlijn@arch ~ % cat .config/sway/config | grep XDG
# XDG Session setup
exec "systemctl --user import-environment DISPLAY XAUTHORITY WAYLAND_DISPLAY XDG_CURRENT_DESKTOP"

[ConsularParadi]

Hi @ToxicMushroom, talking to the creator of niri, seems like the environment variables are being setup by systemd script niri-session.
What remains is the problem of exiting a tty session using Ctrl+d to actually enter the window manager.
Thank you for your response though. I better understand the interaction of display protocol and login manager now.