Forum Discussion
When screen sharing people see black screen
Hi Viren_Manek;
Believe is ISP related.
Change the QoS setting in Teams fixed the problems for us.
Your tenant admin needs to change this:
Teams Admin> Meetings > Meeting Settings > Network
Turn off -> Insert Quality of Service (QoS) markers for real-time media traffic
Also update Teams client to the latest version.
Log-out and log back in.
Restart your Teams app.
You may need to wait for the change to kick in.
Good luck.
Regards
Tenny
Thank you, for pursuing this issue. I've had this problem on and off, trying to share my screen in Teams. I've tried various ways to resolve the problem. I thought it may have something to do with the resolution of my screen - it has a very high resolution, being a Surface Pro. However, even lowering that didn't help.
I then came across this thread. I appreciate the methodical way that you went about it - until the issue was resolved (for you). I am the admin for our organization and have just turned off "Insert Quality of Service (QoS) markers for real-time media traffic". I hope this will resolve my problem as well.
Unfortunately the turning off of "Insert Quality of Service (QoS) markers for real-time media traffic" in the Teams Admin Meeting settings did not do the trick for me. I also tried connecting through my mobile hotspot in case it had anything to do with restrictions on my work network - to no avail.
Interestingly, in the same meeting, with the same connection, a colleague can share their screen with me - no problem, but visa versa it doesn't work.
- I have the same problem here in a Telstra NBN Fiber connection. I don't think it is just ISP related, but it may be a combination of router and ISP. I have an ASUS router RT-AC88U. If I connect laptop directly to the NBN modem, I don't have the problem. Therefore it will point to the router. I have disabled everything that I though it may give issues, but it still the same problem. So no QoS, and basically disabled all the security features with no go. If I use a VPN it works. Everything points to the router. I need to test it with another router.
Findings \ Notes:
1. Black screen sharing when using Asus - Router --> Telstra NBN
2. Works fine when connected directly: Laptop -- > Telstra NBN (no Asus router between laptop and NBN)
3. It works when using wireless broadband to Telstra network.
3. It works when VPNing out
4. It works when both machines are in the same network, therefore no router between them.
5. It works with the Web client- Hi all,
hope this might help:
we had more than 10 users had this issue over a month ago, turned-off "Insert Quality of Service (QoS) markers for real-time media traffic" in Teams admin settings fixed the issue for all initially. However, the problem re-occurred for 3 users used to have the problem and 1 new user a couple of weeks ago. We then turn-on "Insert Quality of Service (QoS) markers for real-time media traffic" on late 25th Jun, and turn-off the setting on 27th Jun early morning. it fixed the issue for those 4 users since. All our users do not have the issue since. The key here is not to change the setting immediately. Hope it work for you.
