Discord screen share not working

[westongpt]

I am open to the idea this is not specifically a Niri issue, but I am wondering if anyone else has seen this or knows the fix. I can capture video with OBS just fine, but discord hangs on the "pick your window to share" screen and I can't start streaming. This worked when I was using plasma-wayland as my desktop environment.

I am using nixOS and latest niri. I have set up XDG desktop portals for gtk and gnome. I have tried Vesktop, Discord, and Discord-Canary.

[Sempyos]

Run discord from a terminal and see if it outputs any logs when you attempt to screen share and fail

[westongpt]

I don't see much, at least nothing marked as error, or containing wayland, vaapi, nvidia, screenshare or stream. and nothing when I click the "Make a selection" button.

the closest thing I see is but it appears very disconnected from the stream event in the log.

17:40:10.023 › [AVError] AV error reported: no-audio-input-detected {"channelId":"1334695021039058954","mediaSessionId":"f13cb8217ec6d3970ea21e40c376d01d","rtcConnectionId":"9c214f21-0b67-46cb-a1bd-6ad41e75efc6","mediaContext":"default","videoDeviceName":"HD Pro Webcam C920","audioInputDeviceName":"Default: PRO X Wireless Gaming Headset Mono","audioOutputDeviceName":"Default: USB Audio S/PDIF Output"}

the logs are pretty clean too.

[Sempyos]

Hm, can you check the journalctl for xdg-desktop-portal-gnome when you attempt to stream..?

[westongpt]

I did journalctl -eg xdg-desktop-portal-gnome and got no entries. I also tried just xdg too, only results were unrelated things from a couple days ago, but at least that shows the command was working.

[westongpt]

So I switched over to Vesktop to test there and I actually got something useful when I clicked share. i did not see this with the official client.

87627:0108/181848.600201:ERROR:third_party/webrtc/modules/desktop_capture/linux/wayland/screen_capture_portal_interface.cc:54] Failed to request session: GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: No such interface “org.freedesktop.portal.ScreenCast” on object at path /org/freedesktop/portal/desktop
[87627:0108/181848.600213:ERROR:third_party/webrtc/modules/desktop_capture/linux/wayland/base_capturer_pipewire.cc:93] ScreenCastPortal failed: 3
Error during screenshare picker Failed to get sources.
(node:87627) UnhandledPromiseRejectionWarning: TypeError: Video was requested, but no video stream was provided
    at VesktopMain:97:5807
(Use `electron --trace-warnings ...` to show where the warning was created)
(node:87627) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 3)
[87627:0108/181853.097542:ERROR:third_party/webrtc/modules/desktop_capture/linux/wayland/screen_capture_portal_interface.cc:54] Failed to request session: GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: No such interface “org.freedesktop.portal.ScreenCast” on object at path /org/freedesktop/portal/desktop

[westongpt]

Ok I figured it out, after using Vesktop which gave me much better error messages, I was able to note that it couldn't find the -gnome desktop portal. I adjusted my XDG portal config as below (I use nixOS).
Specifically I changed the common.default portal from GTK to Gnome and restarted the portal service. it's working now.

systemctl --user restart xdg-desktop-portal.service

This is in my configuration.nix

  xdg.portal = {
    enable = true;
    xdgOpenUsePortal = true;
    extraPortals = [
      pkgs.xdg-desktop-portal-gtk
      pkgs.xdg-desktop-portal-gnome
    ];
    config = {
      common.default = [ "gnome" ];
    };
  };

[Sempyos]

Yippee

[Dreuzz]

where would you need change this for arch?

[Sempyos]

In your niri-portals.conf
https://yalter.github.io/niri/Getting-Started.html#manual-installation

[Vaishnav-Sabari-Girish]

Could someone give me the exact steps to resolve this issue . I tried adding gnome in my niri-portals.conf and still I am not able to share my screen in discord.

I installed discord using paru -S discord

Current niri-portals.conf

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

[Sempyos]

How are you staring niri, and do you have xdg-desktop-portal-gnome installed..?

[Vaishnav-Sabari-Girish]

niri is one of the options in my Display manager alongside GNOME and hyprland. And yes I do have xdg-desktop-portal-gnome installed .

Is there a specific way to start niri that you would recommend ?

[Sempyos]

Can I ask what your display manager is..?

[Vaishnav-Sabari-Girish]

Ly. The TTY based display manager.
https://github.com/fairyglade/ly

[diabloget]

You could try doing what I did.

First, my Niri portals configuration looks like this:

[preferred]
default=gtk
org.freedesktop.impl.portal.ScreenCast=wlr
org.freedesktop.impl.portal.Screenshot=wlr
org.freedesktop.impl.portal.Settings=gtk

Second, within your Niri configuration file, add these lines:

spawn-at-startup "dbus-update-activation-environment" "--all"
spawn-at-startup "/usr/libexec/xdg-desktop-portal" "-r"

Make sure the regular portals, wlr, and gtk packages are installed on your system.

If none of the previous steps worked, make sure the session is being reported properly by running this in the terminal:

echo $WAYLAND_DISPLAY
echo $XDG_CURRENT_DESKTOP

That should return something like wayland-0 (or 1) and niri.

Also, while running Discord or any variant, after pressing the screen share button, give it a few seconds. It may take around 5-10 seconds to start sharing, so avoid using Discord for a bit just to make sure it doesn't cancel the action by mistake.