Screensharing issue

[aacebedo]

Hi,

I am not 100% sure yet, but I think that hy3 causes a problem with screensharing of tabbed windows and hyprland portal.

If I try to share a non-focused tabbed window using https://mozilla.github.io/webrtc-landing/gum_test.html, I end up with a blank screen. This does not happen if the window is visible when I start sharing, but it freezes if I tab the window that is currently shared.

I am using hyprland, hy3 0.34 and xdg-desktop-portal-hyprland 1.3.1 on NixOS.

Anyone can reproduce?

[Mange]

Seems to be the same effect for me.

Note that window sharing always fails for me except for the first share after a Portal restart, so my reproduction was basically this:

1. Restart portal
2. Try to share window $window.
3. Wait for preview to come up in my browser.

Case	Outcome
Visible non-tabbed window	Works
Visible tabbed window	Works after some time, most of the times
Tabbed window that is not focused	No preview response, not even black screen

> hyprctl version
Hyprland, built from branch  at commit 4f804d5f962070c531dea5025e61be8a0da8129e  ().
Date: 2024-01-31

# plugin=/nix/store/xp15haqh2pkwa48p187mncdqq5108cw3-hy3-0.1/lib/libhy3.so

[outfoxxed]

So what happens if you do the same thing on a normal hyprland group? We do roughly the same thing in hy3 that hyprland does with hidden windows in a group.

[aacebedo]

So what happens if you do the same thing on a normal hyprland group? We do roughly the same thing in hy3 that hyprland does with hidden windows in a group.

Tried grouped window, and it seems to have the same problem. So it may be related to hyprland. I opened a bug here hyprwm/xdg-desktop-portal-hyprland#179. Depending on the response, I'll close this one.

[outfoxxed]

Alright let me know if its not just a hyprland issue

[sleroq]

Screensharing a window works on Hyprland 0.47.0. Maybe it's solved.

Also tested with Discord Canary.

[Mange]

Screensharing a window works on Hyprland 0.47.0. Maybe it's solved.

Also tested with Discord Canary.

This issue is about about tabbed windows. Did you test that?

---

I decided to test myself now to help triage. I used WebRTC samples - getDisplayMedia to test this in my browser.

1. I opened multiple windows in a tabbed container.
2. I screenshared "A window" and picked one of the windows that were not shown in the tabbed container, i.e. an unfocused backgrounded tab.
3. Window appeared immediately in screenshare. I could swap around focus in the tabbed group and it remained working, no matter which window was shown on my screen.

I think this issue can be closed.

$ hyprctl version
Hyprland 0.47.1 built from branch v0.47.1-b at commit 75dff7205f6d2bd437abfb4196f700abee92581a  (version: bump to 0.47.1).
Date: 2025-01-29
Tag: v0.47.1, commits: 75dff7205f6d2bd437abfb4196f700abee92581a
built against:
 aquamarine 0.7.2
 hyprlang 0.6.0
 hyprutils 0.5.0
 hyprcursor 0.1.11
 hyprgraphics 0.1.1


no flags were set

$ rg hy3 ~/.config/hypr/hyprland.conf
2:plugin=/nix/store/ay580zqynvd57yc2v6pcjpj5qchxdp91-hy3-0.47.0/lib/libhy3.so

[outfoxxed]

Was likely fixed with hyprwm/Hyprland#9041. Closing for now.