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Re: black screen when using Teams from browser. Check you have environment variables set correctly: XDG_SESSION_TYPE=wayland and XDG_CURRENT_DESKTOP=sway. I set up them in my .zshrc before starting sway. This helped me to fix the black screen issue. Hope it helps you too!

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If those env vars weren't set screen-sharing with xdpw would be broken as a whole because pipewire wouldn't invoke it, which wasn't the case. Other applications like that one python gstreamer script could access xdpw just fine, and Firefox and Chromium could screen-share in other websites (like Mozilla's gUM test page) just fine; the only one broken was Teams.

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