I have recently upgraded from ubuntu 20.04 LTS to ubuntu 22.04 LTS Recently I have stuck with the problem of black screen while sharing full screen on video calls be it Discord, Google meet or Zoom. I think the problem is with ubuntu 22.04 LTS I already tried multiple browsers like chrome, brave, firefox and opera for google meet.
See what I see in browser
The new Ubuntu 22.04 uses Wayland, which for security reasons does not yet allow screen capturing on recording and a call.
Wayland should support screen capturing on Firefox by default, but since this is not working for you, then the way that I know to fix this is by changing from Wayland to Xorg (check out this post about enabling screen share on Wayland: Screen sharing with Wayland)
All you need to do is log out, press your user, press the little setting icon at the bottom left, and from Ubuntu select Ubuntu on Xorg.
Hope this worked for you and good luck!
