Arch Linux

0BADC0DE

Member

From: Regnum Utriusque Siciliae

Registered: 2018-02-21

Posts: 342

[SOLVED?] KDE/Plasma on Wayland: weird screen sharing

Hi all.
Since sometime now screen sharing features in my KDE/Plasma on Wayland is behaving in a weird way.
When I need to do a screen sharing session (it is usually via browser) I get this sequence:

1. A dialog from the browser (Vivaldi in my case), to choose whether I want to share an entire screen, a window or a single browser tab. Let's say a screen.
2. A KDE window from "Portal - Screen Sharing" to choose which item I want to share. Let's say I choose the external screen. This window closes after my choice.
3. I am back at the dialog at te step #1 where I choose "SHARE" button.
4. The other party sees something is to be shared, but it only gets an empty screen.
5. Another KDE window like the one at step #2 pops up. I select again the external screen.
6. The other party finally sees the shared screen.

In the past it was needed only t reach step no.3 to get it done. But I don't know is this behavior is now my fault (likely) or something else.

Any idea?

My system is:

Kernel Version : 6.6.1.zen1-1
Plasma Version : 5.27.9-1
KDE Version : 23.08.2-2
Frameworks Version : 5.111.0-1
Qt5 Version : 5.15.11+kde+r12-1
Qt6 Version : 6.6.0-3
Wayland Version : 1.22.0-1
XOrg/Wayland Version : 23.2.2-1
Mesa Version : 1:23.2.1-2
LibVA Version : 2.20.0-1
VDPAU Version : 1.5-2

To get the screen sharing I have installed these packages (and related dependencies):

extra/xdg-desktop-portal 1.18.0-2
extra/xdg-desktop-portal-kde 5.27.9-1
extra/kpipewire 5.27.9-1
extra/pipewire 1:0.3.84-1
extra/wireplumber 0.4.15-1

Last edited by 0BADC0DE (2023-11-10 10:51:38)

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Maybe Computers Will Never Become As Intelligent
As Humans. Surely They Won't Ever Become So Stupid.

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,285

Re: [SOLVED?] KDE/Plasma on Wayland: weird screen sharing

I've noticed that as well today, on a limb I'd wager pipewire regression since it's the most recently updated thing with a relation here, but I'm not 100% sure, maybe also chromium regression/haven't tested other browsers

Works fine on firefox, seems like a chromium bug.

Last edited by V1del (2023-11-09 16:44:12)

0BADC0DE

Member

From: Regnum Utriusque Siciliae

Registered: 2018-02-21

Posts: 342

Re: [SOLVED?] KDE/Plasma on Wayland: weird screen sharing

I could finally make a test with Firefox "119.0.1 (64-bit)" and Ungoogled-chromium "119.0.6045.105 (Official Build, ungoogled-chromium) Arch Linux (64-bit)", besides Vivaldi "6.4.3160.42 (Stable channel) stable (64-bit)" .
The behavior I am experiencing seems to be linked to the browser and not to the underlying system: it is "normal" with Firefox (1 popup), it is "weird" for both (Ungoogled-)Chromium and Vivaldi (2 pop ups).

Firefox test hasn't been straightforward, though.
First, Slack web-client (my preferred app) seems to be resistant to Firefox screen sharing features. I couldn't make it work (my fault?).
So I reverted to Zoom web-client.
I had to enable `media.webrtc.camera.allow-pipewire` and `media.webrtc.capture.allow-pipewire` in the `about:config` menu to make it work.
No browser restart was needed.

Upon screen sharing request I allowed for it and a single pop up asked me what to share. Then it worked without any double request.

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Maybe Computers Will Never Become As Intelligent
As Humans. Surely They Won't Ever Become So Stupid.