1787395 - [Ubuntu 18] Screen is not shared in a meeting

Status: RESOLVED WONTFIX

(Core :: WebRTC: Audio/Video, defect)

Description

[Catalin Sasca, Desktop QA [:csasca]]

Attachment: no sharescreen ub18.webm

Found in

• Firefox 105.0b3

Affected versions

• Firefox 105.0b3
• Firefox 106.0a1

Affected platforms

• Ubuntu 18.04

Steps to reproduce

1. Launch Firefox
2. Access Google Meet and initiate a call
3. Click on Sharescreen and select Allow

Expected result

• The screen/window is shared in the meeting

Actual result

• The screen/window is not shared in the meeting.

Regression range

• Will see for a regression

Additional notes

• The issue can be seen in the attachment.
• Seems that only Ubuntu 18.04 is affected.
• Encountered it first on Snap build, but happens on regular builds as well.

Comment 1

[Andre Klapper]

What is "Ubuntu 18"? 18.04? 18.10? Please avoid ambiguity - thanks!

Comment 2

[Catalin Sasca, Desktop QA [:csasca]]

Hey Andre, it is Ubuntu 18.04.

Comment 3

[Nico Grunbaum [:ng, @chew:mozilla.org]]

Catalin, could you download a linux build from the Elm project repo https://treeherder.mozilla.org/jobs?repo=elm&revision=5cf402e6d4f6bd0830794486210ee2c9284d14e3 ? It contains screen sharing updates that have yet to be merged to central. Additionally are you using X11 or Wayland? Thanks!

Comment 4

[Catalin Sasca, Desktop QA [:csasca]]

Attachment: screen 2.png

Hey Nico, tried with the latest available build from the Elm project repo but this still reproduces, can't select any screen/window to share. I'm on wayland it seems. I'll attach an screen with this here.

Comment 5

[Bogdan Maris, Desktop QA]

Attachment: First bad nightly build

I had to do a manual regression search here and I found out a good build and a first bad build (2020-11-10 - Nightly 84.0a1), both builds xwayland and not X11. Here is the pushlog for it:
https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=5942060b993b1dc093e16619d661949da5a2fa9d&tochange=e581b02b5df54c1cdf194316dba74a5cf65145b6 (not sure which could be the culprit here)

On the first bad build the dropdown showing the windows to share looks like this (mind you that I have lots of other apps open in the background) and selecting Entire screen will not share anything.

Comment 6

[Pascal Chevrel:pascalc (PTO until April 26)]

Catalin, is this still reproducible (we had a major webrtc upgrade this cycle)

Comment 7

[Ryan VanderMeulen [:RyanVM]]

(In reply to Bogdan Maris [:bogdan_maris], Release Desktop QA from comment #5)

https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=5942060b993b1dc093e16619d661949da5a2fa9d&tochange=e581b02b5df54c1cdf194316dba74a5cf65145b6 (not sure which could be the culprit here)

https://hg.mozilla.org/mozilla-central/rev/83e587a40f30 maybe?

Comment 8

[Bogdan Maris, Desktop QA]

(In reply to Pascal Chevrel:pascalc from comment #6)

Catalin, is this still reproducible (we had a major webrtc upgrade this cycle)

I'm answering for Catalin. I can still reproduce this issue using latest Nightly 107.0a1 from today on Ubuntu 18.04 (xwayland).

Comment 9

[Catalin Sasca, Desktop QA [:csasca]]

Still reproducing the issue on 107.0b6 snap build on Ubuntu 18.04.

Comment 10

[Andreas Pehrson [:pehrsons]]

(In reply to Bogdan Maris [:bogdan_maris], Release Desktop QA from comment #5)

Created attachment 9294605 [details]
First bad nightly build

I had to do a manual regression search here and I found out a good build and a first bad build (2020-11-10 - Nightly 84.0a1), both builds xwayland and not X11. Here is the pushlog for it:
https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=5942060b993b1dc093e16619d661949da5a2fa9d&tochange=e581b02b5df54c1cdf194316dba74a5cf65145b6 (not sure which could be the culprit here)

On the first bad build the dropdown showing the windows to share looks like this (mind you that I have lots of other apps open in the background) and selecting Entire screen will not share anything.

Enabling the pipewire desktop capture backend on wayland is in that list and the likely culprit.

Martin, could you take a look?

Comment 11

[BugBot [:suhaib / :marco/ :calixte]]

Set release status flags based on info from the regressing bug 1675767

Comment 12

[Martin Stránský [:stransky] (ni? me)]

Yes, looks like your system is misconfigured. Wne you select "use system settings" a portal dialog should popup up where you select which resource to share. So don't use Wayland/XWayland on 18.x line where it's broken. For Wayland use 22.X line.