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Issue 717366 link

Starred by 2 users
Status: Duplicate
Merged: issue 715689
Owner: ----
Closed: May 2017
Cc:
guidou@chromium.org
niklase@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Windows
Pri: 2
Type: Bug-Regression



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Screen sharing not working on secondary monitor

Reported by jboer...@clearslide.com, May 2 2017 
UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.81 Safari/537.36

Steps to reproduce the problem:
1. Have two monitors up
2. Go to a screen sharing app (Google Hangouts for example)
3. Start to share your screen
4. Choose to share screen 2

What is the expected behavior?
The second screen should share correctly.

What went wrong?
The screen share won't share (and the preview will show a black screen). 

Did this work before? Yes Chrome 57

Chrome version: 58.0.3029.81  Channel: stable
OS Version: 10.0
Flash Version: 

I haven't been able to reproduce this with just any combination of displays, but we have had a significant number of inbounds about ou own screen sharing app with respect to this issue, so I don't think it is particularly rare.

I've attached screenshots with the display info for the setup where we can reproduce.

The issue also appears on the canary release, but hangouts actually says there was an error. We see similar behavior in our app (an actual error rather than failing silently). There don't appear to be any console errors in hangouts to provide.

Since I have a setup that can reproduce the issue, I am happy to run any diagnostics or collect any information you might need to either provide a workout or resolve the issue.

Please let me know!
external_display.PNG
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external_display_2.PNG
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external_display_3.PNG
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external_display_4.PNG
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external_display_5.PNG
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canary_hangouts.PNG
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Comment 1 by kochi@chromium.org, May 2 2017

Components: Blink>MediaStream UI>Shell>MultipleMonitor

Comment 2 by guidou@chromium.org, May 2 2017

Components: -Blink>MediaStream Blink>GetUserMedia>Desktop

Comment 3 by joi@chromium.org, May 3 2017 

There have also been inbound reports for this from CrankWheel users, exactly the same bug I think. We have not yet been able to reproduce on our own test rig but this is happening for multiple users of CrankWheel.

I'm pretty sure this started happening in Chrome 58. A user reported that things were fine for her and her colleagues until a few days earlier, then started breaking for all of them as a group. This was several days after Chrome 58 was rolled out on stable, but weeks after any previous update to CrankWheel.

jboerner@, any details on the test rig where this reproduces for you?

niklase@, any specific details you'd like us to collect from affected users?

Comment 4 by niklase@chromium.org, May 3 2017

Mergedinto: 715689
Status: Duplicate (was: Unconfirmed)
Yeah this is coming with a new capturer for Windows in 58, we ended up turning it off for 58 (as of yesterday) so these problems should go away.

Comment 5 by joi@chromium.org, May 3 2017 

Great, thankyou niklase@.

I'll ask our customer to try again. I'm assuming the setting that turns off the new capturer should already have propagated to all users?

Comment 6 by niklase@chromium.org, May 3 2017 

This is a finch change, so a Chrome restart should be enough.

Comment 7 by joi@chromium.org, Jun 30 2017 

Is it possible the new capturer was turned on again in 59? A customer is reporting that they can share one screen but not the other, and that with two screens in the picker, the other one than the one they select is the one that gets shared.
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