Screen Sharing Becomes Blurry with Multiple Guests on Teams Web App in Linux

Question

Screen Sharing Becomes Blurry with Multiple Guests on Teams Web App in Linux

Bipin Kumar 15

I am experiencing an issue with screen sharing in Microsoft Teams through the web app on Linux.

When I join a Teams meeting using the Teams web app and share my screen:

With only one guest/participant viewing my shared screen, the screen sharing works normally and the quality is clear.

When the number of guests/participants increases, the shared screen gradually becomes blurry.

With multiple participants viewing the shared screen, the screen can become extremely blurry, making text and other content difficult to read.

The issue occurs specifically when multiple users are viewing the shared screen.

The same screen-sharing session works correctly when there is only one participant.

Environment:

OS: Ubuntu/Linux

Application: Microsoft Teams Web App

Browser: Chromium/Google Chrome

Scenario: Teams meeting → Share screen → Multiple participants view the shared screen

Steps to reproduce:

Open Microsoft Teams Web App on Linux.

Join a Teams meeting.

Share the entire screen.

Have one participant view the shared screen — the quality is clear.

Add additional participants to the meeting.

Ask multiple participants to view the shared screen.

The shared screen becomes significantly blurred.

Expected behavior:
The shared screen should remain clear and readable regardless of the number of participants viewing it.

Actual behavior:
Screen-sharing quality deteriorates significantly as the number of participants viewing the shared screen increases, eventually becoming very blurry.

This appears to be related to multi-user screen-sharing in the Teams Web App on Linux, rather than an issue with the screen itself, because screen sharing works correctly when only one participant is viewing it.

Diogo Klein 10 Reputation points

2026-08-18T18:50:41.29+00:00

Hello,
I'd like to share a similar experience. We had a meeting with over 100 participants where a presenter using Linux experienced continuous degradation in screen-sharing resolution. The issue did not occur when other participants using Windows shared their own screens.

We eventually traced the issue to a single participant watching the presentation over a poor connection. As soon as that participant left the meeting, resolution immediately returned to its original quality. We subsequently confirmed this behavior was exclusive to screen sharing by Linux users.
Marko Galenic 0 Reputation points

2026-08-19T18:38:00.1733333+00:00

I have the same issue as OP, can you please triage this problem to highest priority? This is a core functionality of Teams, and it is absolutely unacceptable to have these issues in 2026 in the age of AI.

Furthermore I cannot grasp, regarding Diogo comment, that 1 user (which is not myself) with poor network connection degrades my screen sharing in crucial meetings.

And also, why is the fallback image resolution degradation? We are not streaming video games, but static documents, JIRA pages and code. Primary fallback should be frame lag, while still keeping pixel perfect resolution.

And even if for some reason you need to degrade my resolution, a good UX would be to provide me with potential causes so I can actually solve this issue myself. I embarrassed myself today and looked unprofessional with blurry screen and wasted my precious colleagues' time.

Trying to help you Microsoft, please listen to the users and put UX on the first place. Thank you.

1 answer

Your answer

Diogo Klein 10 Reputation points

2026-08-18T18:50:41.29+00:00

Hello,
I'd like to share a similar experience. We had a meeting with over 100 participants where a presenter using Linux experienced continuous degradation in screen-sharing resolution. The issue did not occur when other participants using Windows shared their own screens.

We eventually traced the issue to a single participant watching the presentation over a poor connection. As soon as that participant left the meeting, resolution immediately returned to its original quality. We subsequently confirmed this behavior was exclusive to screen sharing by Linux users.
Marko Galenic 0 Reputation points

2026-08-19T18:38:00.1733333+00:00

I have the same issue as OP, can you please triage this problem to highest priority? This is a core functionality of Teams, and it is absolutely unacceptable to have these issues in 2026 in the age of AI.

Furthermore I cannot grasp, regarding Diogo comment, that 1 user (which is not myself) with poor network connection degrades my screen sharing in crucial meetings.

And also, why is the fallback image resolution degradation? We are not streaming video games, but static documents, JIRA pages and code. Primary fallback should be frame lag, while still keeping pixel perfect resolution.

And even if for some reason you need to degrade my resolution, a good UX would be to provide me with potential causes so I can actually solve this issue myself. I embarrassed myself today and looked unprofessional with blurry screen and wasted my precious colleagues' time.

Trying to help you Microsoft, please listen to the users and put UX on the first place. Thank you.

Answer 1

Dear Bipin,

Thank you for the clear reproduction steps, that is very helpful. Because the share is clear with one viewer but degrades as more participants join, this may involve Teams' adaptive media quality, the Linux browser capture pipeline, or a current service-side regression, rather than a simple resolution problem.

I did find a recent thread from another user reporting very similar behaviour across both Windows and Linux devices here, so this may not be isolated to your setup. However, I could not find an official Microsoft advisory confirming a service-wide incident for multi-viewer sharing specifically.

For problems of this nature, I recommend that the Global Admin in your organization create a service request with Microsoft Support. A technical support engineer can perform a remote session to review the meeting telemetry directly, confirm whether the stream is being downgraded server-side, and escalate to the Teams engineering team if this turns out to be a regression. For detailed instructions on how to get support, please refer to Get support - Microsoft 365 admin. If you don't know who your IT administrator is, please refer to this article: How do I find my Microsoft 365 admin? - Microsoft Support

For additional assistance, use this link to find the appropriate contact number from your region: Contact Microsoft customer support | Microsoft Support

I truly hope you get your issue resolved swiftly. Please know that even though I can't directly intervene, directing you to the correct, specialized support is the most effective help I can provide from my position. Thank you for your patience and understanding. Please let me know if you need anything else. Wishing you all the best.

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Marko Galenic 0 Reputation points

2026-08-19T18:48:37.73+00:00

I do not think it is the users' responsibility to help the developers/maintainers find bugs/regressions. If I tell my CTO to have a technical support engineer hop on our meetings, I imagine he would think that I'm joking. Can you test this in-house whether the regression is client-side or server-side?

I'm in drastic need to have this fixed since I'm holding Teams meetings practically everyday for multiple people, and if the cause is 1 person having poor internet connection, someone can indeed troll/sabotage my meetings, and I wouldn't even know :/.

Can you please forward this issue to the people responsible, I truly think this is the core functionality of Teams