[kde] [Bug 472471] New: [Wayland] Screen sharing breaks on Teams after a few minutes

[bugzilla_noreply at kde.org]

https://bugs.kde.org/show_bug.cgi?id=472471

            Bug ID: 472471
           Summary: [Wayland] Screen sharing breaks on Teams after a few
                    minutes
    Classification: I don't know
           Product: kde
           Version: unspecified
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: andrea.ippo at gmail.com
  Target Milestone: ---

SUMMARY
Only on Wayland (doesn't happen on X11), when I start a screen or window share
session via Teams for linux, the "canvas" of the shared content freezes at some
point, and is not refreshed anymore.
The mouse cursor though keeps being transmitted to the other person in the
call/meeting, making things very confusing, as they see my cursor moving over a
canvas which is NOT the one I am seeing at that moment (for example, they may
be seeing an app I'm no longer in, or a browser tab I've previously visited
before moving to another one).

I haven't seen any recovery from this. Once the issue happens, it stays like
that for the rest of the call, until someone tells you, then you can unshare
and share again (until it happens again a few minutes later).


STEPS TO REPRODUCE
1. Setup a teams meeting between two accounts of yours (the other one can be
anything, not necessarily Microsoft - you will be able to join with a meeting
ID + PIN)
2. start the meeting from a Wayland KDE session using the teams for linux app
(flatpak) or the official (CRAPPY!) progressive web app provided by MS (i.e.
teams.microsoft.com). Bear in mind that you have to use chromium or edge for
best results (yeah I know, don't even get me started)
3. join the meeting with any device of your liking, this is to simulate the
"passive" guest of the meeting, that has to see what the active/presenter has
to share. Mobile device is fine as well (e.g. Teams for Android)
4. once both parties have joined, share your screen or a window from KDE
Wayland
5. check on the receiving device that you see the screen being shared, and keep
an eye on it as you switch apps/tabs on the presenter device

OBSERVED RESULT
Eventually, the receiver device will see the mouse cursor moving over a
canvas/window which is NOT the one you are on in the presenter device.
Unsharing and re-sharing on the presenter device is the only (ephemeral)
workaround for this, short of killing the call entirely.

EXPECTED RESULT
The receiver device should keep seeing the presenter mouse cursor movements AND
the canvas/window over which it is moving

SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20230718
KDE Plasma Version: 5.27.6
KDE Frameworks Version: 5.108.0
Qt Version: 5.15.10
Kernel Version: 6.4.3-1-default (64-bit)
Graphics Platform: X11 (or Wayland)
Processors: 8 × 11th Gen Intel® Core™ i7-1165G7 @ 2.80GHz
Memory: 15.3 GiB of RAM
Graphics Processor: Mesa Intel® Xe Graphics
Manufacturer: Dell Inc.
Product Name: XPS 13 9305

ADDITIONAL INFORMATION
I suspect this is related to kwin/wayland. I use pipewire on my setup, but if
the problem came from there, I think the display manager should not play any
role. Whereas X11 works fine.

Please let me know if I can attach any logs.

I have written this whole bug report during a call on Teams with myself
(microsoft to gmail account), with screen sharing enabled from the Teams for
Linux app running in an X11 session. Took me 10-15' to write all this, and the
receiving device is still seeing exactly the same contents as the presenter
device. Under Wayland the canvas would have frozen long ago.

I'm trying to get rid of my employer-provided MacBook Pro in favor of
Linux/KDE, but this is a bit of a bummer. Will revert to X11 meanwhile.

Thanks! :)

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