Bug 505121

Summary:	teams: screen share is broken
Product:	[Plasma] plasmashell	Reporter:	slartibart70
Component:	general	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	kde, kde
Priority:	NOR
Version First Reported In:	master
Target Milestone:	1.0
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:
Attachments:	stream working in browser popup

Description slartibart70 2025-06-02 08:39:11 UTC

Hi,
since update to 6.5-dev, the screen-share feature of teams running in a browser is broken.
I tried different (chrome-based) browsers, but no success. The 'best' working browser seems to be ms-edge, here we have a edge-rendered dropdown menu to share e.g. the entire screen.
Acknowledgeing this, a new popup comes up (this is sth. known to me, looks like the portal-popup allowing me to chose from window contents only or entire screen)
Select entire screen here as well.
Back to the browser-dropdown, i can see a preview of the screen selected
Click on 'share or ok' in this dropdown.

Now, the screenshare should happen.
But, the only thing i see is the browser-rendered mini-popup allowing me to 'stop sharing' or 'hide' the mini-popup.
And that's it... no screen share takes place, my chat-partner only sees my camera picture but nothing i tried to share previously

Operating System: Fedora Linux 42
KDE Plasma Version: 6.4.80
KDE Frameworks Version: 6.15.0
Qt Version: 6.9.0
Kernel Version: 6.14.9-300.fc42.x86_64 (64-bit)
Graphics Platform: Wayland

Comment 1 David Edmundson 2025-06-02 08:40:57 UTC

>since update to 6.5-dev, the screen-share feature of teams running in a browser is broken.

But things worked before?

If possible can you test here: https://www.webrtc-experiment.com/Pluginfree-Screen-Sharing/

Comment 2 slartibart70 2025-06-02 08:43:52 UTC

yes, was working properly in 6.4-dev (i am/was using it all the time)

Let me check your link

Comment 3 slartibart70 2025-06-02 08:45:29 UTC

yes, does not work.
The video just displays black contents and a 'spinner' animation

Comment 4 slartibart70 2025-06-02 08:47:30 UTC

more details:

does not work in chromium-based browsers

firefox 139 does work, here i see the preview of entire-screen or individual windows

Comment 5 slartibart70 2025-06-02 08:53:25 UTC

not working in:
chromium, Version 137.0.7151.55 (Official Build) Fedora Project (64-bit)
Microsoft Edge, Version 137.0.3296.52 (Official build) (64-bit)
Ferdium 7.1.0, based on electron 35.1.5

Comment 6 David Redondo 2025-06-02 09:54:03 UTC

Created attachment 181967 [details]
stream working in browser popup

Comment 7 slartibart70 2025-06-02 09:57:37 UTC

@David Redondo
yes - up to this point (your attachment) this also works in my chromium browsers.
Clicking on 'share'/'teilen' and looking at the video-player is where the problem begins :-D

Comment 8 David Redondo 2025-06-02 10:07:04 UTC

It displays correctly in the browser popup but fails then in the webpage itself. Given that it works in firefox, I am inclined to believe that it is a chromium bug.  

According to qpwgraph the stream is not connected to anything but still exists.

Comment 9 David Redondo 2025-06-02 10:13:41 UTC

After further investigation I believe this is the same bug as 504384

Chrome closes and restores the session when closing the popup and going to the webpage. Our portal impl correctly starts the session but something goes wrong along the way...

*** This bug has been marked as a duplicate of bug 504384 ***

Comment 10 slartibart70 2025-06-02 10:17:49 UTC

i see what you mean: qpwgraph has the portal-brave connection but drops it wafterwards
with firefox, the connection is kept.

Still im wondering that all my chromium based browsers have this bug - this would be a bit complicated complaining in their respective bugtrackers for each of 'em (and OBS)?
just saying, it might also be another source of problem...

Comment 11 David Redondo 2025-06-02 10:29:15 UTC

It's a bug in our portal impl when restoring which happened due to refactoring